摘要
川东北地区茅口组古风化壳经历了漫长的沉积间断,期间遭受了长期的风化剥蚀与淋滤溶蚀作用,岩溶十分发育。通过地质、钻井、测井、地震及地球化学等资料的综合研究,结合生产测试资料分析古岩溶储层在地震和测井上的响应特征,预测有利区带。结果表明,该区储层主要储集空间类型是溶洞和裂缝,其中,溶洞系统为主要的储集空间,裂缝起渗滤通道作用,储集类型为"裂缝—溶洞"型,预测龙会场构造以北、雷音铺、温泉井构造是岩溶储层的有利发育区带。
The weathering crust of the Maokou Formation in the northeast of Sichuan had suffered the weather denudation and eluviations for a long-term during a lengthy depositional break, the karst is very well developed. The favorable areas are predicted by the comprehensive research of geological, drill, log, seismic and geochemical data and combined with the response characteristics of the paleokarst reservoir on the seismic and logging data. The result shows that the main reservoir space types are limestone cave and fracture in the area, in which the cave systems are the main reservoir spaces, the fractures play a role in percolation and channels. The reservoir type is ＂fracture-cave＂ reservoir, and the predicted north of Longhuichang structure, Lingyinpu structure, and Wenquanjing structure are the favorable areas of karst reservoir.
出处
《油气地球物理》
2014年第2期31-34,共4页
Petroleum Geophysics
关键词
古岩溶
识别标志
有利区预测
茅口组
paleokarst, identification sign, favorable area prediction and Maokou Formation
