【摘要】：異常高壓油氣藏是塔里木盆地臺盆區(qū)重要的勘探目標(biāo),其中巴什托構(gòu)造于泥盆系東河塘組、石炭系巴楚組、小海子組和下二疊統(tǒng)南閘組發(fā)現(xiàn)了異常高壓油氣藏。利用鉆井測井與試油氣資料,根據(jù)X-射線衍射黏土礦物含量、突破壓力與比表面積等實(shí)驗(yàn)分析結(jié)果,探討巴什托構(gòu)造異常高壓特征與成因。研究表明,石炭系—二疊系處于晚成巖作用階段,黏土礦物大量脫水、天然氣充注和存在欠壓實(shí)帶是形成巴什托構(gòu)造異常高壓的主要原因。高礦化度封閉型地層水、高突破壓力的Ⅰ類和Ⅱ類泥巖和膏鹽巖蓋層是保持巴什托構(gòu)造異常高壓的重要條件。
[Abstract]:The abnormally high pressure oil and gas reservoir is an important exploration target in the platform area of Tarim Basin. The abnormally high pressure oil and gas reservoirs were discovered in the Devonian Donghetang formation, the Carboniferous Bachu formation, the Xiaohaizi formation and the Lower Permian Nanzha formation. Based on the data of drilling logging and oil and gas test, according to the experimental analysis results of X-ray diffraction clay mineral content, breakthrough pressure and specific surface area, the characteristics and genesis of abnormal high pressure in Bashto structure are discussed. The study shows that the Carboniferous-Permian system is in the stage of late diagenesis, and a large amount of clay minerals are dehydrated, natural gas filling and undercompaction zone are the main reasons for the formation of abnormal high pressure in Bashto structure. High salinity sealed formation water, high breakthrough pressure type 鈪，

本文編號：2472137