镇泾地区延长组8段致密储层裂缝识别与预测  

Recognition and Prediction of Tight Reservoir Fracture in the Chang 8 Section in Zhenjing Area

作　　者：张世懋[1] 丁晓琪[1] 易超[1] 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059

出　　处：《测井技术》2011年第1期36-40,共5页Well Logging Technology

基　　金：国家自然科学青年基金项目"鄂尔多斯盆地晚三世延长期几个关键性事件沉积及其与油气聚集关系研究"(40602012)

摘　　要：鄂尔多斯盆地镇泾地区延长组8段致密储层非均质性强，裂缝发育不均，给油气勘探、注水开发带来一系列的困难。根据镇泾地区延长组的岩心照片观察及常规测井、电成像测井资料研究，对地层的单井及平面展布特征进行了分析。结果表明，延长组长8段地层具低孔隙度低渗透率的特点，平均每口井发育裂缝3～6条，裂缝大多为高角度缝或垂直裂缝，其发育程度与电阻率的径向变化值、幅度差以及砂体厚度、砂层致密程度相关性显著。根据测井资料在单井裂缝识别的基础上，结合砂体展布、沉积相分布特征对该区长8段裂缝发育情况进行了平面展布预测，为该区油气勘探、开发奠定了基础。Chang 8 section tight reservoir is characterized by significant heterogeneity and extensive fractures development, so, it is difficulty in the petroleum exploration and water-injection in Zhenjing area Yanchang formation, Ordos Basin. By observing the core photo of extension group of Zhenjing area, the conventional logging data and the FMI logs, analyzed are the characters of single wells and planar distribution, the results of which show that the Chang 8 section is characterized by low porosity and low permeability, and each well has on average 3- 6 fractures which are mostly high-angle or vertical fractures. The fracture growth grade is related with radial resistivity change value, extent resistivity difference, sandstone thickness and sandstone tight grade. According to logging data and single well fracture identification, forecasted is fractures planar distribution in Chang 8 section with sand body distribution and sedimentary faces distribution. The above method laid a foundation for oil and gas exploration and development in this area.

关 键 词：测井识别 致密储层 高角度裂缝 砂体控制 平面预测 长8段 

分 类 号：P631.84[天文地球—地质矿产勘探]