文档介绍：鄂尔多斯盆地东部地区上古生界储层裂缝研究
摘要:鄂尔多斯盆地裂缝发育程度影响着低渗储层的渗流和产出能力,但由于裂缝发育机制的复杂性,故裂缝性油气藏一直是勘探开发亟待解决的问题。目前裂缝评价方法多以常规测井资料为主。储层裂缝可以在沉积、压实固结、构造变形、剥蚀抬升和油气运移等沉积盆地演化的各个环节中形成,具有复杂多样的形成机制。
本文以岩心观察、露头剖面资料分析为主,钻井资料、测井资料和测试分析资料为辅,对鄂尔多斯盆地东部地区上古生界储层裂缝进行研究。结果表明,该区发育了3种类型的裂缝。裂缝类型有区域构造缝、水平缝和成岩缝,其中区域构造缝呈北东向,其在上古生界各层位均有发育。裂缝是低渗透油气藏中流体的主要渗流通道,其发育规律影响着裂缝油气藏的分布规律。所以研究该区内裂缝的分布规律对重点勘探层位内天然气起到了重要作用。
关键词:裂缝;上古生界;鄂尔多斯盆地;东部地区
The Study on fracture of the Upper Paleozoic
In the easteron Area of Ordos Basin
Abstract: The permeability and yield of reservoir is mainly dependent on the development degree of fracture in Ordos Basin, which was important and difficult to determine the fracture type of those reservoirs in oil-gas exploration, identification and evaluation. Currently, there are various methods used for evaluating fractures,reservoir fracture in deposit, compact solidify, structure buckle, denude uplift and oil-gas escape and so on depositional basin evolve formation, have been diversified developed mechanism.
The research results indicate that three kinds of fractures are found from the upper Paleozoic strata in the Yulin-Shenmu region of the eastern Ordos Basin, all conclusions were based on cores data, crop well data, drilling data, logging data and testing data research. The fractures consist of regional structure fractures, horizontal fractures and diagenesis fractures. The regional structure fractures mainly extending along the northeast direction appear in all the strata of upper Paleozoic. The method of fractures research development affect fractural oil-gas distribute method, fractures also are the passageway in the low permeable reservoir for oil and gas accumulation.
Keywords: fracture; upper Paleozoic; Ordos Basin; Easten area
目录
THE STUDY ON FRACTURE OF THE UPPER PALEOZOIC II
IN THE EASTERON AREA OF ORDOS BASIN II
1 前言 1
1. 1 研究目的及其意义 1
国内外研究现状及研究存在的问题 1
研究方法和手段 4
完成的主要工作量 5
数据处理 5
绘制图表 5
2 盆地地质概况 6
研究区概况 6
盆地构造演化史 7
中晚元古代坳拉谷阶段 8