储量研究中油藏边界的确定方法

176200512中国海上油气CHINAOFFSHOREOILANDGASVol.17No.6Dec.2005:,,1958,,,,:20910:010-62097095赵文智毕海滨()新的储量计算规范中明确了用于确定含油面积的两个边界:油藏边界和储量边界油藏边界属于地质边界,而储量边界受人为因素制约油藏边界主要包括油水界面岩性边界和断层边界等确定油藏边界应综合考虑油藏类型储层分布特征及区域地质特征对于构造油藏,油水界面是圈定油藏边界最直接的依据在确定油水界面的4类方法中,试油法和测井解释法具有较高的精度,而地层压力测试法和其它间接方法有一定的局限性对于岩性油藏,不同沉积环境所形成砂体的展布宽度是有差异的对于特低渗透油藏,应使用单井稳定产量作为储量起算标准圈定油藏边界油藏边界地质储量油藏油水界面试油砂体分布2,,,,,,,1,[1],,569419t,276%,6%~72%[2],,(1),,,12,,,3802005,,4:(RFTDST)21,,,50%;,,22,,,,,23(RFT/FMT)(DST):!;∀,,,,,,,,,1991,,12(RFT)-2505m;,,,,-1760~-2490m24,#∃()[3],151,,,,,331,,(),2()(),,,(2)232,,,,,,,176:3811).,1996,,,,,%13,,,,,-1050m,,-1054m-1030m,24m33,,,,,,,,,;,,,,101(13%~16%)(36&10-3~594&10-3m2),,,6~7m,15m(3)310134,[4],#∃,,,,,,,,,(),();,,,[5]35,,,,,1),34320,02~06km59,,,438220055911,,(),200m(400m),1),03~25km,12~225km(2),,,,1(m)(m)(m)(m)(m)(%)(m)22150613048082161252~5284853317016033606~15155~10124587744033072694~138910~1545001197704208401190~16671).,19972(m)(m)(km2)%21315~225230%3210~2530~11321~313∋3505~0715~2608~23%1,1503~0612~1404~0736,[6],,,,,,,,01~03t,25~144t/d,,,(1),3,(6)6176:383,3,15%4(1),,(2),4:(RFTDST),,(3),;,;,1.:,20052,..(),2003,17(4):252~2553..:,19964..:,19985,,..:,19906,,...2005,26(3):48~51:20050708(:)ThemethodstodeterminereservoirboundaryforreservesresearchesZhaoWenzhiBiHaibin(ResearchInstituteofPetroleumExplorationandDevelopment,PetroChina,Beijing,100083)Abstract:Twoboundaries,i.e.thereservoirboundaryandthereservesboundary,havebeenintroducedinthenewstandardsofreservesestimation.Thereservoirboundaryisageologicallimit,andthereservesboundaryiscontrolledbyartificialfactors.Thereservoirboundaryincludesoilwatercontact,lithologicboundaryandfaultlimit.Thereservoirtype,reservoirrockdistributionandregionalgeologyshouldbeconsideredindeterminingthereservoirboundary.Theoilwatercontactisthemostdirectevidencetodeterminetheboundaryofastructuralreservoir.Therearefourmethodstodetermineoilwatercontact,inwhichtheformationtestingandwellloggingaremostaccurate,andtheformationpressuredetectionandtheotherindirectmethodhavesomelimitations.Forlithologicreservoirs,thewidthofsandstonedistributionisdifferentindifferentdepositionalenvironments.Forreservoirswithverylowpermeability,astableproductionofasinglwellshouldbeusedasanindicatorofreservesestimationtodeterminethereservoirboundary.Keywords:reservoirboundary;originaloilinplace;reservoir;oilwatercontact;formationtesting;sandstonedistribution