【作者】 金文辉；

【导师】 周文；

【作者基本信息】 成都理工大学 ， 油气田开发地质， 2010， 硕士

【摘要】 苏西盒8段气藏是一个低压、低渗透、低丰度、大面积分布的岩性气藏,勘探开发资料表明储层段岩性复杂,非均质性强,因此准确识别气水层、正确认识气水分布规律成为制约气田开发的关键技术问题。本文在前人苏西盒8气藏研究成果的基础上,结合研究区钻井、测井和水质分析资料,对苏西48区储层物性、砂体展布、测井解释、生产动态特征和全区不同水类的离子化学特征的综合研究,取得了如下成果与认识:1、依据测井解释成果、试气生产数据、注入和返排量结合对水质分析资料,将苏西产水类型划分为正常地层水、凝析水、淡化地层水、残液四类;研究认为该地区成藏保存条件良好。2、利用岩心、薄片资料分析了盒8段的物性特征,并结合测井资料科学有效的识别了盒8岩性,建立了砂泥岩电性识别标准,分析了砂体的剖面、平面展布规律,并进一步识别了砂岩类型,加深了对储集层认识。3、采用多种方法研究不同产层流体测井响应特征并对全区单井储层流体进行了有效识别,筛选出了流体判别的一些较好方法;结果表明,盒8下1段是气藏主力产层,推荐使用以孔隙度-电阻率为主,地层水孔隙度法、多元判别分析和视地层水电阻率法为辅助进行苏西48区盒8段流体识别。4、分析了全区39口试产井的试气资料和全区不同水类的离子化学特征,总结了三类投产井出水机理,即局部边底水、透镜状水、致密地层水;结合砂体分布、砂顶微构造、气水剖面剖析了研究区气水空间分布特征,指出气藏不存在统一的气水界面,进而对气水分布区作出了预测;最后总结了研究区的三类气水分布模式。更多还原

【Abstract】 He 8 of the west area of Sulige Gas field is a lithologic gas reservoir with low pressure、low permeability and low reserve abundance and large area distribution. Exploration and Development data show that the reservoir has strong heterogeneity and lithology is complex. Therefore, accurate identification of gas and water layer and the correct understanding of gas and water’s distribution as the key technology which constraint to the development field. Based on the studies of former researchers on this area,combining drilling data、log interpretation and data of water quality analysis of the research area, a comprehensive research on reservoir physical property、distribution of sand bodies、log interpretation、production performance character and ions chemical characteristics of different kinds of water on the whole research area, achieve some results and cognitions such as :1、Basis for well logging interpretation、gas production test production data、injection and flow back amount combing water quality analysis data, water production type of the west of Sulige is divided into normal formation water、condensate water、ontzilte formation water、raffinate;In this study we consider that reservoir formation preservation conditions is good in this region.2、Use core thin section data to analyze physical properties characteristics , combing logging data scientific and effectivly discriminated lithology Of He 8,establish identification standards of electrical property of sand-mud stone,analyzed profile、planar distribution law of sand body,and furtherly discriminated sandstone type, and it have deepened our knowledge of reservoir.3、Use various methods to study on fluid log response characteristics of different producing formation , make effectively recognition about reservoir fluid of single well of the whole region, select some good methods to discriminant fluid; the results showed that, He 8 lower 1 is the main production layer of gas reservoir, recommend porosity/resistivity as t main method, formation water porosity、multivariate discriminant analysis and apparent water resiscivity technique as auxiliary method to recognit fluid of He 8 of the west of sue league 48 area;4、Analyze production performance of 39 wells and ions chemical characteristics of various water in the whole region, summarize three kinds of water breakthrough of commissioning well, that are relative centralized water、lenticular water、compact formation water; Analyze gas/water spatial distribution of the study area combining sand distribution、top of sand body structure and gas/water profile, obtain that there is no unified gas/water interface of gas reservoir, then make a prediction about the gas/water distribution area. At last, the paper generalizes three gas/water distribution patterns.更多还原