长庆油田靖边-吴旗地区三叠系长6_3油组储层评价
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摘要
靖边-吴旗地区延长组低渗透储层发育,研究程度低,勘探、开发难度大。应用岩心观察、岩心分析、岩石薄片和测井、地震等资料,综合研究研究区长63储层特征,预测了优质储层的发育情况。结果表明,长63油组储层岩性主要为岩屑质长石细砂岩,碳酸盐岩胶结为主,粒间孔为主要的孔隙类型,属于低孔-低渗、特低渗储层。影响储层物性的因素主要包括岩性、胶结物含量、孔隙类型和沉积相类型几个方面。研究区好储层、中等储层主要发育在水下分流河道微相和远砂坝微相发育部位。
In Yanchang Formation of Jing'an-Wuqi Area,low-permeability reservoirs were grown,exploration and development were difficult.Date of core observation,core analysis,thin section,well-logging and seism were used to comprehensively study the characteristics of Chang 63 Reservoir and predict the growth of optimal reservoirs.The result indicates that the Chang 63 reservoir consists mainly of lithic arcose and fine sandstone and carbonate cementation.The intergranular pores are the main pore types,which belong to low porosity,low permeability and extra low permeability reservoirs.The factors influencing the reservoir properties mainly consist of lithologic property,cement content,pore types and types of sediment facies.The high-quality and medium reservoirs are developed in the microfacies of underwater distributary channels and distal bars.
In Yanchang Formation of Jing'an-Wuqi Area,low-permeability reservoirs were grown,exploration and development were difficult.Date of core observation,core analysis,thin section,well-logging and seism were used to comprehensively study the characteristics of Chang 63 Reservoir and predict the growth of optimal reservoirs.The result indicates that the Chang 63 reservoir consists mainly of lithic arcose and fine sandstone and carbonate cementation.The intergranular pores are the main pore types,which belong to low porosity,low permeability and extra low permeability reservoirs.The factors influencing the reservoir properties mainly consist of lithologic property,cement content,pore types and types of sediment facies.The high-quality and medium reservoirs are developed in the microfacies of underwater distributary channels and distal bars.
引文
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[2]赵澄林,刘孟慧,姜在兴,等.渤海湾早第三纪断陷盆地含油气岩系沉积学及沉积相基本特征[J].石油学报,1991,12(2):28～32.
[3]刘孟慧,赵澄林.碎屑岩储层成岩演化模式[M].东营:石油大学出版社,1993.15～26.
[4]姜向强,钟大康,张琼.辽东湾地区古近系砂岩成岩作用与孔隙演化[J].西安石油大学学报(自然科学版),2007,22(6):14～19.
[5]刘延海,王应斌,陈国童,等.辽东湾北区油气藏特征、主控因素与成藏模式[J].中国海上油气,2007,19(6):372～373.
[6]王峰,田景春.鄂尔多斯盆地北部上古生界盒8储层特征及控制因素分析[J].沉积学报,2009,27(2):238～244.
[7]谢庆帮,贺静.陕甘宁盆地南部上三叠统延长组低渗砂岩储层评价[J].天然气工业,1994,14(3):16～19.
[8]杨晓萍,赵文智,邹才能,等.低渗透储层成因机理及优质储层形成与分布[J].石油学报,2007,28(4):57～61.
[9]李文厚,魏红红,当振芳,等.苏里格庙气田碎屑岩储集层特征与天然气富集规律[J].石油与天然气地质,2002,23(4):387～391.
[10]侯洪斌.鄂尔多斯盆地北部上古生界天然气成藏条件与勘探方向[M].北京:石油工业出版社,2004.51～52
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