塔里木盆地克深气田超深层致密砂岩储层裂缝分级分组合特征

发布时间：2018-05-28 09:25

  本文选题：塔里木盆地 + 克深气田　； 参考：《天然气地球科学》2017年11期

【摘要】：塔里木盆地克深气田白垩系巴什基奇克组砂岩储层是库车山前的主力产气层,具有埋藏深度大、基质物性差的特征,构造裂缝普遍发育,特征及分布复杂,且对单井产量影响较大。目前针对该地区裂缝的研究已投入大量的工作,研究内容主要包括基于钻井岩心、成像测井等资料的裂缝精细描述;多方法多轮次裂缝分布规律预测等,但是受到取心程度、地震资料品质、常规测井资料等限制,裂缝预测的效果不佳。考虑到克深气田超深层致密砂岩储层裂缝具有多尺度特征,且不同尺度裂缝的发育特征、成因及分布规律有所不同,研究将裂缝进行分级,系统地梳理了各级裂缝及其组合的发育特征和规律,并探索了裂缝与产量的关系。研究认为:(1)综合考虑裂缝的长度、开度、发育特征等因素,将克深气田储层裂缝划分为"Ⅰ级裂缝—米级裂缝"、"Ⅱ级裂缝—颗粒贯穿缝"、"Ⅲ级裂缝—粒缘缝"三级裂缝;(2)根据各级裂缝的尺度、成因及组合特征,建立了克深气田储层三级裂缝组合,即"Ⅰ级裂缝组合—优势裂缝带"、"Ⅱ级裂缝组合—优势裂缝及伴生缝"、"Ⅲ级裂缝组合—粒缘缝网";(3)克深气田储层多尺度缝网有效沟通砂体和砂层组,连通粒间溶蚀扩大孔,产生粒内溶孔及微孔隙,提高储层的渗流能力,对单井产量影响较大,是超深层致密砂岩储层天然气高产、稳产的关键。
[Abstract]:The sandstone reservoir of the Cretaceous Bashiqike formation in Keshan gas field, Tarim Basin, is the main gas producing reservoir in front of Kuqa Mountain, with the characteristics of large burial depth and poor physical properties of matrix. The structural fractures are generally developed, and the characteristics and distribution are complex. And the single well production is greatly affected. At present, a great deal of work has been devoted to the study of fractures in this area. The research contents mainly include fine description of fractures based on drilling core and imaging logging data, prediction of distribution law of multiple methods and rounds of fractures, etc., but the degree of coring is obtained. The quality of seismic data and conventional logging data are limited, and the effect of fracture prediction is not good. Considering that the fractures in the ultra-deep tight sandstone reservoir of Kesheng gas field have multi-scale characteristics, and the development characteristics, genesis and distribution of the fractures of different scales are different, the classification of fractures is studied. The development characteristics and rules of fractures and their assemblages at all levels are systematically combed, and the relationship between fractures and yield is explored. The study considers that the length, opening, and developmental characteristics of the fracture are considered synthetically. The reservoir fractures in Kesheng gas field are divided into "class 鈪，

本文编号：1946170