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启动压力梯度影响下低渗透气藏水平井产能模型的建立

第17卷第1期2010年2月

特种油气藏

Special O il and G as R ese rvo irs V ol 17N o 1Feb 2010

收稿日期:20090515;改回日期:20091026

基金项目:国家自然科学基金项目 水平井压裂改造及砾石充填防砂技术研究 (50274055)

作者简介:杨学云(1981-),女,助理工程师,2005年毕业于中国石油大学(华东)石油工程专业,2008年获中国石油大学(华东)油气田开发工程专业硕士

学位,现从事采油工程方案设计工作。

文章编号:1006-6535(2010)01-0085-03

启动压力梯度影响下

低渗透气藏水平井产能模型的建立

杨学云1

,张学婧1

,蒋国斌1

,曲占庆

2

(1 中油大庆油田有限责任公司,黑龙江 大庆 163453;2 中国石油大学,山东 东营 257061)摘要:将气藏中的流动区域分为达西流动区域和非达西流动区域2部分,气藏水平井湍流只发生在水平井附近短半轴小于10个井半径的旋转椭球体内,而达西流动存在于此椭球体外。借助前期水平井研究成果,考虑启动压力梯度对低渗透气藏中气井产能的影响,推导出低渗透气藏水平井新型产能模型。新模型考虑了启动压力梯度对水平井产能的影响,对水平井产能预测研究有重要意义。

关键词:启动压力梯度;水平井;产能模型;低渗透气藏;产能预测中图分类号:TE33 文献标识码:A

前 言

实际气藏开发过程中,大量气井产气剖面资料表明,部分低渗透层动用较差或者未动用。同时,因大量稳定试井资料(即采气指示曲线)不通过原点而无法求取气井的无阻流量,上述现象在低渗透气藏开发中的表现更加突出

[1-5]

。这与油藏的生

产特征极为相似,表明气藏中气体的渗流特征与油藏渗流特征一样存在着启动压力梯度[6-9]

。但是,

目前在水平气井产能研究中,还没有考虑启动压力

梯度的影响。

万仁溥

[10]

认为,水平井的压降较直井低,因此

湍流只发生在水平井附近很小的区域内。吕劲

[11]

认为,水平井在井筒附近的等势面是以井的2个端点为焦点的旋转椭球面,气藏水平井湍流仅发生在井附近短半轴小于10个井半径的旋转椭球体内,而此椭球体外的流动是达西流动,可以使用水平井达西流在各种地层边界条件下的产能公式。基于以上理论并考虑启动压力梯度对气井产能的影响,进行详细的研究。

1 模型的建立

在三维自由空间内,水平井的等势面是一族以

井的2个端点为焦点的旋转椭球面。对于一般储层,由于油气藏边界对井附近区域的影响可以忽略不计,因此等势面也是椭球面。由于非达西流仅在高速气流中发生,而水平井压降较直井压降低很多,一般仅有直井的1%,故可以认为非达西流动区域S n 是以r n 为短半轴的旋转椭球。由于r n 很小,通常不超过10r w ,这意味着S n 是一个极扁的椭球。

气流的速度方向即椭球内法向几乎与井垂直

[5]

,表明椭球S n 的非达西流可以视为径向流。

为简单起见,将S n 视为一个等效圆柱体,柱高为水平井长度L ,令圆柱半径为R n ,假设S n 的表面积与等效圆柱体的侧面积相等,于是有:

2 R n L =S n =

12

2

r n L (1)

在天然气藏中,高速气流在气井附近为湍流,其压力梯度与渗流速度服从二次流动规律。假设:地层等温;忽略气体重力的影响;不考虑井筒储集效应,考虑启动压力梯度的影响,有:

p =p -G r n

(2)

式中:p 为任一点压力,M Pa ;p 为地层的平均压力,MPa ;r 为渗流半径,m;G 为启动压力梯度,M Pa /m 。

引入拟压力m (p ),得到在径向流情形下非

86 特种油气藏第17卷 达西流满足的二项式规律:

d m d r =

2p

Z

K

v+ v2(3)

=1 873 108H r w T sc R

r g p sc K

D(4)

式中:H为有效厚度,m;Z为气体偏差因子; 为气体黏度,mPa s;K为储层有效渗透率, m2; 为气体密度,kg/m3;v为气体流速,m/s;p sc为标准状态下的压力,MPa;T sc为标准状态下的温度,K;r w为井筒半径,m;r g为气体相对重度;D为惯性系数;R 为通用气体常数,与其他变量的单位有关,R= 0 008314MPa m3/(k m o l K)。

已知流动速度方程为:

v=-

Kg

p

L

-G,

p

L

G

0,

p

L

(5)

对于圆柱体,其侧面积为A,气体的体积流量为Q,则有:

B g=p sc ZT

pT sc

(6)

式中:T为地层温度,K。

因此有:

v=Q

A

=

B g Q

A

=

p sc TZQ

pT sc(2 L r)

(7)

又因为:

=28 97r g p

ZRT

(8)

将式(7)、(8)代入式(3),并在区间[R n,R w]积分得到:

m n-m w=p sc TQ

T sc KL ln

r n

r w

+

28 97 r g p sc2TQ2 2 2 RT sc2L2

4

1

r w

-

1

r n

-

G

p

ln

r n

r w

(9)

式中:m n为椭圆球面S n上的拟压力,MPa;m w为以R w为短半轴的椭圆球体上的拟压力,M Pa。

考虑表皮系数并转化成压力平方的形式,则得到二项式形式为:

(p n )2-(p w f )2= Zp sc T

T sc KL(l n

r n

r w

+S+S sp)Q+

57 94 r g Zp sc2T 3RT sc2L21

r w

-

1

r n

-

G

p

l n

r n

r w

Q2(10)

其中

p n =p n-G r n(11)

p w f =p w f-G r w(12)式中:p n为椭圆球面的压力,M Pa;p w f为井底压力, MPa。

式(10)就是在非达西流动区域内的二项式模型。

储层在椭球面外的气体的流动服从达西流动规律。储层边界是以

H

2

为短半径的旋转椭球面,椭球面的拟压力m b为常数,并考虑启动压力梯度的影响,得到:

m b-m n=

Qp sc T

2 K LT sc

(l n

H2

2r n2ln

2L

r n

)+S sp )

(13)式中:H为气层有效厚度,m。

得到达西流动区域的二项式产能方程为:

(p b )2-(p n )2=

Zp

sc

T

2 KLT sc

(l n

H2

2r n2l n

2L

r n

)+S sp )Q

(14)

其中

S sp =-

G

p

(r e-r n)(15)式中:r e为供给半径,m。

综合考虑达西流动区域和非达西流动区域,得到考虑启动压力梯度的水平气井二项式产能模型:

(p e )2-(p w )2=aQ+b Q2(16)其中

p e =p e-G r e(17)

p w f =p w f-G r w(18) a=

Zp sc T

T sc KL[

1

2

l n

H2

2r n2l n

2L

r n

+ln

r n

r w

+S

-

1

2

G

p

(r e-r n)-

G

p

(r n-r w)](19) b=

57 94 r g Zp sc2T

3RT sc2L2

1

r w

-

1

r n

-

G

p

ln

r n

r w

(20)

式(16)~(20)就是基于启动压力梯度影响下综合考虑达西流域和非达西流域的低渗透气藏水平井产能模型。

2 算例分析

某低渗透气藏中的水平气井K=0 75 10-3

第1期杨学云等:启动压力梯度影响下低渗透气藏水平井产能模型的建立87

m2, =0 022mPa s,L=100m,r w=0 06985m, =3 108m-1,G=0 008M Pa/m,T=353K,p e =30M Pa,T sc=293K,p sc=0 101325M Pa,r e =500m,H=20m,r g=0 6,S=0,Z=0 97, R=8 314Pa m3/(k m o l K)。

表1 不同方法计算结果对比

计算方法q

AOF

/(104m3/d)误差/%系统试井12 030 00

G i ger模型8 3230 84

J oshi模型8 6727 93修正J os h i模型10 6911 14

B orisov模型15 3327 43

李晓平模型12 766 07

张黔川模型12 584 57

本文模型11 593 66

利用气井产能预测软件分别应用G iger模型、Joshi模型、修正的Josh i模型、Borisov模型、李晓平模型、张黔川模型和本文中得到的模型进行水平井产能计算。除本文得出的模型,其余几个模型均未考虑启动压力梯度对水平井产能的影响。将各计算结果与系统试井得出的产能预测结果进行误差分析,可知本文模型预测出的产能结果误差更小,更加贴近实际。说明启动压力梯度的存在确实影响水平井的产能预测。

3 结 论

(1)综合考虑达西流域和非达西流域,推导出启动压力梯度影响下的低渗透气藏水平井二项式产能模型。

(2)与不考虑启动压力梯度模型计算结果对比可知,启动压力梯度在一定程度上影响着低渗透气藏中水平井的产能预测。基于启动压力梯度影响的低渗透气藏水平井二项式产能模型预测结果能更加准确地反映水平井产能。

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m eas u red rel ati ve p er m eab ili ty curve.Th i s m odel can be u s ed to calcu l ate o ild is p l ace m en t effici en cy and to predict d evelopm ent perf or m ance.Th is3D pore net work model is undoubted l y an eff ecti ve supple m entary m eas u re f or ne w l y d i scovered gluten ite reservoir wh ich has not conducted core test.

K ey words:gl u ten i te res ervo i r;m i croscop i c pore struct u re;pore net w ork m od e;l w ater fl ood i ng;d i sp l ace m ent characteri sti cs

An approa ch to applyi ng stra i ght fo r ward m ethod i n o ilfi eld dev elop m ent

W ANG Xu e-zhong

(Sheng li Oil fiel d Co mpany,SI NOPEC,Dongying,Shand ong257000,Ch i na)

A bs tract:For the d i ffic u lti es occurred i n oil fi eld devel op m en t,it has b een att e m p t ed to sol ve co m p licat ed proble m s by app l y i ng straight for w ard m eth od.The d istri buti on of h i gh l y s porad ic re m ai n i ng oil has been re-unders t ood by the theory of gravity d ifferen ti ati on.The nu m ber of pure producti on w ells and pu re i n jection w ells has been greatly i m proved,and the p rob le m s ofp roducti on all ocation f or co mm i ngl ed produ ci ng w ell and quan titati ve d e scri pti on of re ma i n i ng oilh ave been solved.It i s s uggest ed to use geother m al resou rces to as s ist oil recovery i n accordan cew it h the prob le m that a large vol um e of crude oil is co m bu sted for generati ng stea m duri ng cyclic stea m sti m u l ati on process.Th i s st udy expands t he i dea of oilfiel d d evelopm ent and is hel p f u l t o future developm ent.

K ey words:strai gh t f or w ard m ethod;geother m al oil recovery;m oderate w ater i n j ecti on;gravity assisted oil recovery;p roporti on of pure producti on w ells

Appli cati on of Lorenz curve to t he s t udy of producti on profile and i njecti on profile

WANG Q i ng,L I U H u i-q i ng,Y I N Fang-hao

(Ch i na University of P et role um,B ei jing102249,Ch i na)

A bs tract:A nal ysis of producti on profil e and i n jection profile can reflect verti calp roduci ng degree of res ervo i rs and p rovi d e ref eren ces for i m p rov i ng d e vel opm en t response.Th i s pap er i ntrodu ces trad i ti onal research m et hod s of producti on p rofile and i n jecti on profile,d i scu ss es i n detail the proces s of an al yz i ng t he uneven degree of producti on p rofile and i n j ecti on profile by u si ng Lorenz curve.The concept of"nonun ifor m it y coeffi cient"is pu t f or w ard t o quanti tatively present the uneven d egree of producti on p rofile and i n jection p rofile.Th i s paper gives exa m ples of actual oilfiel ds s u ch as Liaoh e and Kara m ay O ilfiel d,and enriches the s t udy of p roduction and i n j ecti on profiles.

K ey words:w aterflood i ng;Lorenz curve;produ cti on p rofile;i n j ecti on profil e;uneven degree;nonun i for m ity coeffici en t

A na l ys i s of geo l og i cal factors affecti ng horizontal well stea m fl oodi ng

L IH u i1,LI C hun-lan1,Z HAO Q i-s huang2,WE IM i n1,LI Ben2

(1.M OE K ey L abora t ory o f P etrole um Eng i n e ering,Ch i na University of P et role um,Be i jing102249,Ch i na;

2.G re a tW a llD rilli ng E ng ineering C orp.,P et roChina,Panjin,L i a oning124010,China)

A bs tract:The i m pacts of various geologic factors(stratigraph i c d i p,per m eab ility,i n iti al oil sat u rati on,reservo i r th i ckness,reservoir dep t h and crude oil vi scos i ty)on t he ti m i ng of converti ng t o stea m floodi ng after cyclic stea m sti m ulati on and t h e res ponse of hori zon t a lw ell s t ea m floodi ng have been s t ud i ed t h rough num erical si m u l ation for a heavy oil reservoir i n L i aoh e oil fi eld.The res u lt i nd i cates that t h em aj or influenci ng f act ors are i n itialo il s at urati on,reservo i r t h ic kn ess and o il viscos it y.Th i s st udy p rov i des reli ab le theoretical basis for screen i ng geol ogical cond i ti on s of hori zon t al w ell s t ea m fl ood i ng i n a heavy oil reservo i r.

K ey words:heavy o il reservoir;horizontalw el;l cycli c stea m sti m u l ati on;stea m fl ood i ng;geological fact or;t h e ti m ing of stea m sti m u lati on-s t ea m fl ood i ng conversi on

Establishi ng and s o l v i ng o f a ne w percolati on m odel for complex gas res ervoirs

CH EN C ai-yun1,SUN Yu-bao2

(1.Daqi ng P etroleum Instit u te,Daqing,H eilong ji ang163318,Ch ina;2.COSL Oilfi e l d P rodu ction Division,T i anjin300450,China)

A bs tract:For t h e change of fl u i d property i n co m p l ex gas reservoirs,a w edge-s h aped m odel has been e m ployed t o s i m u late the i n cli nation angl e w hen fl u i d or geo l ogy has changed,thus estab lis h ed a percolati on m odelw i th i n cli nati on angle,w h i ch i s cl os er to the act u algeo l og i cal cond i ti on.The m odel has been s o l ved for botto m h ol e pseudopress u re of co mp lex gas reservoir i n Lap l ace s pace t h rough Lap l ace tran sf or m and i n real s pace t h rough S t eh fest i nversi on.Type cu rves w it h i ncli n ati on ang l e are p l otted for co mp lex gas reservo i r;the effects of t h em ob ility rati o of i n t ernal and external re gion and the i ncli n ati on ang l e on t ype cu rves have been st ud ied;and w ell test i n t erpretati on i s gi ven through s p ecific exa mp les.

K ey words:gas p ercol ati on;w edge-shaped co mp lex gas reservoir;theoreticalm odel of w ell t esti ng

Study on seepag e fi eld of horizontal well pattern in anis o tropi c res ervoirs

Z HOU H ong-li ang1,YI N H ong-j un1,L iM ei-f ang2,Z HANG Shao-hu i1

(1.MOE K e y L aboratory of Enhance d O il and G as R ecovery,Daqing P et role um Institute,D aqi ng,H eilongjiang163318,China;

2.Daqi ng O il fiel d Co.,L t d.,P etroCh i na,Daqi ng,H eilong ji ang163712,Ch i na)

A bs tract:Th is pap er stud i es the d i stri bu ti on l a w of seepage fi el d f or horizontalw ell pattern,p res en ts s trea m li ne constru cti on m et hod,and deri ves an equati on of for m ation press u re f or unsteady seepage fl ow of horiz ontalw ell pattern i n an is otropic reservo i r by us i ng s ource-s i nk theory,Ne wm an s productmethod and pressure drop s uperposition p ri nci p l e i n order to vis ua ll y refl ect the characteristi cs of press u re distri bu ti on and the fl o w i ng tracks of reservo i r fl u i d.Th e res u lt s ho w s that the seepage fiel d of hori zon t alw ell pattern is sens iti ve to reservoir an is otrophy,p roduction ti m e,and i n j ecti on-producti on ratio.H oriz ontalw ell s hall b e placed verti cal to t he orientation of the m axi m um per m eab ilit y i n order to f or m li n ear water flood i ng and en hance d is p lace m en t effect.Th e l onger t h e p roduction ti m e is,the larger the p ress ure p ropagation area i s,and the h i gher t h e d egree of reserve recovery is;and t h e h i gher t he i n j ecti on-producti on rati o i s,t h e l arger t he s w ept area of i n j ected fl u i d is,and the h igher t h e s w eep effi ciency is.The seepage fiel d m ap generated by th i s m et hod can p rov i de a sci en tifi c basis for t h e d es i gn of hori zon t al developm entw ell pattern and t he opti m iz ati on of i n j ecti on s trat egy i n an is otrop i c reservoirs.

K ey words:an i sotrop i c res ervoi rs;s eepage fi eld;horiz on talw el;l w ell pattern;isop i estic li ne;s trea m li ne

H orizon t a l well deli verability m odel of low per m eability gas reservoirs consi deri ng thres ho l d press ure gradient

YANG Xue-yun1,Z HANG Xue-ji ng1,JI ANG Guo-b i n1,QU Zh an-q i ng2

(1.D aqi ng Oil fiel d C o.,L t d.,P etroCh i na,Daqi ng,H eil ongj i ang163453,Ch i na;

2.Ch i na University of P et role um,D ongy i ng,S handong257061,China)

A bs tract:Th e fl o w regi m es i n a gas reservoir are d i vi ded i n t o Darcy flo w and non-Darcy flo w regi m es.The turbu l en ce of h orizontal gas w ells on l y happen s i n t he rot ary elli psoi d w it h short se m i-axis less than10rad i u s of t he w ell bore,w h il e the fl ow ou tsi d e t h e elli psoi d fits Darcy s la w.Bas ed on p rev i ous st udy of horizontalw ells,a ne w deli verab ilit y m odel ofhoriz ontal gas w ell i n l o w per m eab ili ty gas reservoir has been derived w it h con si d era ti on of the i n fl uen ce of t h res hold p ressure grad i en t.The m odel is very hel p f u l t o pred icti on of d eli verab ilit y of horizontal gas w ells.

K ey words:t hreshol d press u re grad ient;horizontalw el;l d eli verab ilit y m ode;l lo w per m eab ilit y gas reservoir;deliverab ility predicti on

F easibility study and fi eld practice of water flooding converti ng to stea m fl oodi ng i n the east of Fuyu o ilfi eld

GU W u,DONG X i ao-li ng,JI ANG Xue-song,Z HUANG Shu-l an,LI Yan-hua

(Jilin Oil fiel d Co mpany,P e t ro Ch ina,Songyuan,Jilin138000,Ch i na)

A bs tract:The east of Fuyu oilfi el d belongs t o conventi onal h eavy oil reservoir,has b een w ater fl ooded for30years and entered h i gh w ater c u t st age, and has p rob le m s of l o w oil recovery rate,lo w recovery percent of reserves,and i nvali d w ater ci rcu l ation.Phys i ca l and num erical s i m u lati on s have d e t er m i ned that converti ng to stea m fl ood i ng i s a feas i b l e w ay afterw ater fl ood i ng i n t h e east ofFuyu oilfiel d,and t h e rati onalw ay ofw ell pattern conver s i on and stea m injecti on para m eters are op ti m i zed.The fi el d tes t conducted i n2007-2008had ach ieved good res u lt and p rovided techn i cal s upport for i m provi ng devel op m en t res pon se and recovery factor in t h is area.

K ey words:w ater fl ood i ng;num eric s i m u l ati on;cyclic stea m sti m u lati on;stea m floodi ng;fi el d test;the east of Fuyu oilfi el d

St udy on pro fil e control and oil dis place m ent by m oveable gel and acti ve w ater for heavy o il res ervoirs

HAN Shu-bai

(L i aoh e O il field C o mpany,P etroCh i na,Panjin,L iaoning124010,Ch i na)

A bs tract:The f or m ula s yste m s of p rofile con trol and oil d i splace m ent have been screened accord i ng t o res ervoi r charact eristics,o ilp ropert y and i n j ec t ed w ater quality ofH ai1heavy oil reservoir d eveloped by w ater flood i ng.The i n fl u enci ng factors of gel perfor m an ce are eval uated.F iel d tests have been perf or m ed for typ icalw ell group s t o ad j ust the for mu la s yste m and i n j ecti on process accord i ng to practical produ cti on cond i ti on s by follo w i ng t he pri n ci p l e of reduci ng ri sk and en s u ri ng s u ccess.C o mp rehen si ve eval uation has been made for the effect of profil e con trol and oil displace m ent,t he i m prove m en t of w aterw ell cond i ti on s,and t he effectiveness ofwater i n j ecti on,etc.,by using EOR theory and e m p iri cal equati ons as w ell as dyna m ic and s t ati c data.The resu l t sho w s t h at the produci ng degree and t he recovery factor ofw ater floodi ng have i ncreased after profil e con trol and oil d is p lace m ent.Th i s study provi des ref eren ce to converti ng oilfiel d devel opm en t strat egy and i m provi ng o il recovery.

K ey words:heavy o il reservoir ofw ater fl ood i ng;m oveab l e gel and active w ater;profil e contro l and o il dis p lace m ent technology;EOR;H ai1reser vo i r

Experi m ental study o f weak base ASP flood i ng effect

Z HANG K e1,Q I N J i-shun2,W ANG J i an3,LU X i ang-guo4

(1.In stit u te of Porou s F lo w and F luid M ec han ics,Ch i ne se A c ad e my of Sc i ences,L angfang,H e bei065007,Ch i na;

2.S t a te K e y L abora t ory of EOR,R esearc h Instit u te of P etrole um Exp l ora ti on and Developmen t,P etroCh i na,B eiji ng100083,C hina;

3.B ranch Company of Ch ina P e t rol eum P i peline Engineeri ng C orporation,L angfang,H e bei065000,Ch i na;

4.M OE K e y Labora tory of E nhanced Oil&Gas R ecovery,Daqi ng P etrole um In stit u te,Daqi ng,H e ilong ji ang163318,Ch i na)

A bs tract:On t he basis of l aboratory experi m en ts,t h is paper stud i es t he p roperty ofw eak al kali/surfactant/pol ym er(ASP)s yste m accordi ng to fi eld requ i re m ent und er t he cond iti ons of sa m e v i scosity and d iff eren t i nterf aci al ten si on as w ellas sa m e i n terfacial tens i on and d ifferent viscosities,d is cu ss es t he i m pact of reservoir het erogeneity on the syste m and the ret en tion vol um e of t h e s yste m i n porou s m ed i a.The rel ati on s h i p bet w een ASP s yste m and t he d egree of recovery factor i m p rove m ent is an al yz ed,and the m echan is m of the sys t e m i s i n tens i vely studied,thu s provi d i ng certai n theoretical basis f or exten si ve and reasonable app licati on ofASP fl ood i ng technol ogy.

K ey words:surfactants;w eak al kali/surfact ant/pol ym er syste m;porous m ed i a;heterogen ei ty;fl u id entry p rofile

Experi m ent research on the i mpa ct of geother ma l water te m pera ture on heavy oil recovery factor

CHEN T ao-p i ng,Z HANG Zh i-q,i L I U Y i ng

(M OE K e y La boratory of E nhance O il Recov e ry,Daqi ng P etroleum In stit u te,Daqi ng,H eilong ji ang163318,Ch i na)

A bs tract:Experi m en t researc h of enhanced h eavy oil recovery by geother ma lw ater dri ve has been conduct ed f or J-99b l ock bas ed on co m patibili ty s t udy of geother m alw ater quali ty i n t he ad j acent w ell J1-01w it h t he res ervoi r.The resu l t of exp eri m en t s ho w s t hat60~85 is the m ost s en sitive range ofEOR to geot h er m alw ater t e m perat u re.W ith i n t h is range,the recovery factor i n creases from3.39%to9.84%.Geother m alw ater of d iff eren t t e m perat u re has a certai n effecti ve i n jecti on rat e.The h i gher the te mp erature of geot her m alwater is,the larger t h e effecti ve i n j ecti on rate i s.W hen i n j ected geot h er m alw ater is at85 ,it is bett er to inject1.5P V.Th i s research p rovides basis f or EOR by geother m alw ater dri ve in J-99conven tional heavy o il reservoir.

K ey words:geother m alw ater;d ri ve;h eavy oi;l EOR;experi m ent research;J-99b l ock

G rey correl a tion analysis o f factors affecti ng s and production i n Sebei gas fi el d

QI N i ng1,Z HOU Fu-jian2,GAO Cheng-yuan3,Q IY an3,SHEN Zh ao-x i a3

(1.China Universit y of P e t rol eum,D ongy i ng,Shandong257061,Ch ina;

2.R esearch In stit u t e of P e t roleum E xploration and D evelo pm ent,P etroChina,B eiji ng100083,Ch i na;

3.Sheng li Oilfiel d C o mpany,SI NOPEC,Dongying,Shand ong257231,Ch i na)

A bs tract:Sand producti on experi m en ts have b een conducted w it h cores fro m S ebei gas fiel d to st udy t h e i n fl u enci ng f act ors on sand p roduction,s u c h as gas p roducti on rate,per m eab ilit y and w ater s aturati on,etc.Grey correl ation anal ys i s m et h od is e m p l oyed t o an al yze t h e i nfl uenci ng factors of s and producti on i n Seb ei gas fiel d,and t he degree of ass oci ati on b et w een t hese factors and sand p roduction is ob tai ned.It is found by anal ys i s t hat t h e ris e ofw ater cut and gas p roduction rate h ave b i gger effect on sand p roduction in Seb eigas fi eld,so t hatw ater contro l is i m portan t and gas produ cti on rate mu st b e strictl y con troll ed.U nderstanding t h e i n tri ns i c rel ations bet w een t h ese factors and s and produ cti on i s helpful t o creati ng good cond iti ons of pro ducti on or adopti ng m eas ures(e.g.,fi ber-co m pound sand control techn i que)to avoi d or reduce sand producti on,and guide rational devel op m en t of Sebe i gas fiel d.