岩性油气藏
巖性油氣藏
암성유기장
LITHOLOGIC RESERVOIRS
2011年
5期
49-55
,共7页
张顺存%仲伟军%梁则亮%鲁新川%贾艳艳%史基安
張順存%仲偉軍%樑則亮%魯新川%賈豔豔%史基安
장순존%중위군%량칙량%로신천%가염염%사기안
成岩作用%储集空间%侏罗系八道湾组%车拐地区%准噶尔盆地西北缘
成巖作用%儲集空間%侏囉繫八道灣組%車枴地區%準噶爾盆地西北緣
성암작용%저집공간%주라계팔도만조%차괴지구%준갈이분지서북연
diagenesis%accumulating space%Jurassic Badaowan Formation%Che-guai area%northwestern margin of Junggar Basin
通过岩心、薄片、扫描电镜、测井、录井及稳定同位素分析,研究了准噶尔盆地西北缘车拐地区侏罗系八道湾组储层的储集空间类型,认为研究区的砾岩主要发育原生粒间孔、次生粒内溶孔及构造裂缝,砂岩主要发育原生粒间孔、次生粒间溶孔及粒内溶孔。在此基础上,对研究区侏罗系八道湾组储层经历的压实作用、胶结作用、溶蚀作用等主要成岩作用的特征进行了研究,发现侏罗系八道湾组砂岩和砾岩都处于晚成岩阶段A期和B期。总结了不同成岩作用对储层储集空间和储层物性的影响机理:压实作用造成储层储集空间减少、物性变差;胶结作用一方面充填储集空间,降低储层物性,另一方面成为支撑颗粒骨架,减弱压实作用的影响,同时在成岩作用晚期为溶蚀作用的发育提供物质基础;溶蚀作用是产生次生孔隙和裂缝,并具有连通作用的最重要的建设性成岩作用。
通過巖心、薄片、掃描電鏡、測井、錄井及穩定同位素分析,研究瞭準噶爾盆地西北緣車枴地區侏囉繫八道灣組儲層的儲集空間類型,認為研究區的礫巖主要髮育原生粒間孔、次生粒內溶孔及構造裂縫,砂巖主要髮育原生粒間孔、次生粒間溶孔及粒內溶孔。在此基礎上,對研究區侏囉繫八道灣組儲層經歷的壓實作用、膠結作用、溶蝕作用等主要成巖作用的特徵進行瞭研究,髮現侏囉繫八道灣組砂巖和礫巖都處于晚成巖階段A期和B期。總結瞭不同成巖作用對儲層儲集空間和儲層物性的影響機理:壓實作用造成儲層儲集空間減少、物性變差;膠結作用一方麵充填儲集空間,降低儲層物性,另一方麵成為支撐顆粒骨架,減弱壓實作用的影響,同時在成巖作用晚期為溶蝕作用的髮育提供物質基礎;溶蝕作用是產生次生孔隙和裂縫,併具有連通作用的最重要的建設性成巖作用。
통과암심、박편、소묘전경、측정、록정급은정동위소분석,연구료준갈이분지서북연차괴지구주라계팔도만조저층적저집공간류형,인위연구구적력암주요발육원생립간공、차생립내용공급구조렬봉,사암주요발육원생립간공、차생립간용공급립내용공。재차기출상,대연구구주라계팔도만조저층경력적압실작용、효결작용、용식작용등주요성암작용적특정진행료연구,발현주라계팔도만조사암화력암도처우만성암계단A기화B기。총결료불동성암작용대저층저집공간화저층물성적영향궤리:압실작용조성저층저집공간감소、물성변차;효결작용일방면충전저집공간,강저저층물성,령일방면성위지탱과립골가,감약압실작용적영향,동시재성암작용만기위용식작용적발육제공물질기출;용식작용시산생차생공극화렬봉,병구유련통작용적최중요적건설성성암작용。
Based on well-core observation,slice,SEM,logging data and stable isotope analysis,the reservoir accumulating space types of Jurassic Badaowan Formation in Che-guai area,northwestern margin of Junggar Basin,are well studied.It is considered that conglomerate in the study area mainly developed primary intergranular pores,secondary intragranular dissolved pore and structural fractures;sandstones in the study area mainly developed primary intergranular pores,secondary intergranular dissolved pore and intragranular dissolved pore.The diagenesis characteristics of compaction,cementation and dissolution are studied.Conglomerate and sandstone of Jurassic Badaowan Formation are in stages A and B of late diagenetic stage.In addition,different diagenesis have different influential mechanism on reservoir space types and physical properties.Compaction can decrease the reservoir accumulating space,and makes the reservoir physical properties become worse.On the one hand,cementation can fill up the reservoir accumulating space,and make the reservoir physical properties become worse,on the other hand,it can support grain skeleton and decrease the influence of compaction,meanwhile,it can provide material for dissolution at the late diagenetic stage.Dissolution is a constructive communicating diagenesis,and it can produce secondary pores and fractures.