摘要
岩心观察、薄片资料、常规物性分析等研究表明，鄂尔多斯盆地蟠龙油田长2储层天然裂缝发育，且主要为高角度裂缝，裂缝充填物主要为方解石，部分未充填裂缝含油性好。采用渗透率异常频率分析方法，研究长2储层裂缝平面变化规律．产量高的井主要落于渗透率异常值在5％～30％和大于50％两个区间内。宏观裂缝的大量存在，起到沟通长7有效烃源岩与长2储层的桥梁作用，从而形成长2储层丰富的石油聚集。微裂缝对基质孔隙的连通起到重要作用，是原油高产的因素之一。
The researches on core observation, thin section data and the analysis of conventional physical property show that the natural fractures are well developed in Chang 2 reservoir of Panlong Oilfield, Ordos Basin and they are high angle fi＇actures. The fractnre filling is mainly calcite and some fractures are not filled with good oil accumulation. Using the abnormal frequency analysis method of permeability, this paper studies the plane variation rnles of fractures in Chang 2 reservoir. The result shows that the high yield wells are in the two intervals of the main permeability anomaly values of 5% to 30% and more than 50%. Macroscopic fractures play a bridge role of communicating the effective source rocks of Chang 7 reservoir and Chang 2 reservoir, forming a rich oil accumulation in Chang 2 reservoir. Mierofiaetures can play an important role in matrix pore communication, which is one of the factors of high oil production.
出处
《断块油气田》
CAS
2012年第1期61-64,共4页
Fault-Block Oil & Gas Field
基金
"十一五"国家科技支撑计划项目"低(超低)渗透油藏精细描述关键技术与剩余油分布预测模型研究"(2007BAB1701)
关键词
裂缝
长2储层
延长组
蟠龙油田
fracture
Chang 2 reservoi
Yanchang Formation
Panlong Oilfield
