CAJ | 학술논문

苏里格气田南区是苏里格气田主体向南的延伸，距离物源区远，储层埋深大，成岩作用强。落实有效砂体分布及主控因素，是苏南等气田边部地区高效开发的基础。以苏南盒8、山1段储层为目标，结合构造、沉积、储层、成岩分析，研究了有效砂体的空间展布特征，总结了有效砂体的主控因素。苏南有效砂体多分布在心滩和分流河道底部等粗砂岩相，垂向上发育孤立型、垂向叠置型、侧向搭接型3种模式，平面上分布在中、东部2条主砂带内。在有效储层形成过程中，宽缓的构造坡降是沉积、成藏的背景，强水动力条件下的浅水辫状河三角洲平原沉积控制了储层的分布格局，而成藏前的压实、胶结、溶蚀等成岩作用深刻改造了储层，塑造了有效砂体的形态。
소리격기전남구시소리격기전주체향남적연신，거리물원구원，저층매심대，성암작용강。락실유효사체분포급주공인소，시소남등기전변부지구고효개발적기출。이소남합8、산1단저층위목표，결합구조、침적、저층、성암분석，연구료유효사체적공간전포특정，총결료유효사체적주공인소。소남유효사체다분포재심탄화분류하도저부등조사암상，수향상발육고립형、수향첩치형、측향탑접형3충모식，평면상분포재중、동부2조주사대내。재유효저층형성과정중，관완적구조파강시침적、성장적배경，강수동력조건하적천수변상하삼각주평원침적공제료저층적분포격국，이성장전적압실、효결、용식등성암작용심각개조료저층，소조료유효사체적형태。
The southern Sulige area is the southward extension of the main part of the Sulige Gas Field, where is far from sediment provenance, buried deep and has a strong diagenesis. Understanding the distribution character?istics and main controlling factors of effective sand body is the basis of the efficient development of the edge re?gions of the Sulige Gas Field, such as the southern Sulige area. Focusing on the reservoirs of He8 member and Shan1 member, the areas of tectonic, sedimentation, reservoir and diagenesis were studied, and the distribution characteristics and main controlling factors of effective sand body were concluded. The effective sand bodies in the southern Sulige area mainly distribute in point bars and the bottom of distributary channels, and can be verti?cally classified into three types:isolated, vertically stacking, and laterally shiplap ones. Horizontally, they locate in the central and eastern sand belts of the study area. During the formation of effective reservoirs, a gentle struc?ture background is necessary for the sedimentation and formation of gas reservoirs. The shallow braided?river delta plain deposits in the strong hydrodynamic environment determined the distribution pattern of reservoir, whereas the compaction, cementation and dissolution diagenesis before the formation progress of gas reservoirs greatly re?formed the reservoirs and controlled the distribution of effective sand body.