惠民凹陷的震积作用及低电阻率油层  

Seismic Deposition and Low Contrast Resistivity Oil Layers in Huimin Sag

作　　者：张小莉[1] 查明[2] 杨剑萍[2] 杨懿[1] 巨银娟[1] 

机构地区：[1]西北大学大陆动力学国家重点实验室/地质学系,西安710069 [2]中国石油大学(华东)地球资源与信息学院,山东东营257061

出　　处：《沉积学报》2006年第6期829-833,共5页Acta Sedimentologica Sinica

基　　金：国家自然科学基金(批准号:40474045);中国石油化工股份有限公司课题"惠民凹陷油气成藏规律及勘探方向研究"(04370500200240)资助。

摘　　要：惠民凹陷沙河街组中存在古地震作用形成的原地扰动层、震浊积岩和震风暴岩,尤以原地扰动层和震浊积岩发育。可见微断层、层内阶梯状断层、震球枕构造、震碎角砾及各种变形构造等震积岩的识别标志。惠民凹陷中央隆起带基山砂体中,震积作用及震积岩分布与火山作用、火成岩分布具有同时间性与同空间性。震积岩,特别是震裂岩和震碎角砾岩中的孔、缝形成早,改善储集层渗透性,可成为一种非均质性很强的储层。该储层具有裂缝-孔隙双重孔隙网络,常形成相对低电阻率油层。Ancient earthquakes formed seismites, seismoturbidites and tempestites in Shahejie Formatiom in Huimin sag. Many kinds of soft identified structures have been found in seismites, such as micro - faults, step micro - faults, seism pillows, seismic breccias and deformation structures. Seismic deposition and seismite distribution have the same time and space with volcanism and igneous in Jishan sandstone body. Pores and fractures formed in early time and they improve the permeability in seismites, especially, in seismic shattering rocks and seismic breccias. Seismites will become the reservoirs that have the strong heterogeneity. The reservoirs often form the low contrast resistivity oil layers because they have the dual pore networks, that is, fractures and pores.

关 键 词：震积作用 测井响应特征 震积岩储层 低电阻率油层 

分 类 号：TE122.2[石油与天然气工程—油气勘探]