Distribution Rule Of Gas And Water In The Eighth Member Of Shihezi Formation In The West Of Su Li Ge Area

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.