苏里格南区马五_5亚段储层特征  

Reservoir Characteristics of Mawu_5 Submember, Southern Sulige Area

作　　者：张岳华[1,2] 雷卞军[2] 杨勇[3] 

机构地区：[1]中国石化西北油田分公司完井测试管理中心,新疆轮台841600 [2]西南石油大学,四川成都610500 [3]中国石油长庆油田分公司勘探开发研究院,陕西西安710021

出　　处：《天然气技术与经济》2015年第2期9-12,77,共4页Natural Gas Technology and Economy

摘　　要：鄂尔多斯盆地奥陶系马家沟组马五段马五5亚段勘探在苏里格南区获得突破。依据苏里格南区岩心、薄片、测井和试采等资料研究了马五5亚段岩性、物性、含气性、试采出水原因。研究表明,不同于马五1-4亚段,马五5亚段储层在粗粉晶白云岩发育,储集空间主要为晶间孔和裂缝。双侧向曲线幅度差可以用来识别高角度裂缝。根据高角度裂缝的发育程度把储层分为孔隙型和裂缝—孔隙型。高角度裂缝提升了储层的渗透性,是裂缝—孔隙型储层高产的主导因素。但试采资料分析表明裂缝也容易沟通远水。以试气结果来标定储层解释结论有误差,试采比试气更真实地反应储层流体性质。The Mawu5 submember of Mawu Member in Ordovician Majiagou Formation, southern Sulige area in Ordos Basin, has been made breakthrough in exploration. For this submember, the lithology, petrophysical property, gas content, and some reasons of producing water during a producing test are studied according to some data from core, thin-section identification, well logging, and producing test. Results show that different from Mawu1- 4submembers, the Mawu5 reservoir is composed of coarse to crystalline dolomites, and its space contains mainly intercrystalline pore and fracture. Amplitude difference of laterolog curve may be used to distinguish some fractures with high angle. Reservoirs can be divided into porous one and fractured-porous one based on the development degree of high-angle fractures. These fractures increase permeability, resulting in high yield. However, many producing test data show that fractures become more prone to connecting with distant water.A little error may be found among gas testing results to calibrate reservoir interpretation result. Compared to the gas testing, the producing test can reflect reservoir-fluid property more truly.

关 键 词：苏里格南区 马五5亚段 裂缝 流体性质 试采 测井 

分 类 号：P618.13[天文地球—矿床学]