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文章旨在通过沉积相的研究,弄清孔雀河斜坡储盖组合,解决长期以来勘探成功率极低,在油气源充足的情况条件下找不到大油气田的问题。利用单井沉积相分析、典型井岩心分析、野外剖面资料和地震测线资料研究结果,得出了塔里木盆地孔雀河地区志留系沉积特点、演化特征及平面展布规律,指出该区在志留纪的沉积是以滨海—浅海为主的海陆过渡相,在北部区域发育有三角洲;结合单井试油试气资料,研究认为该区的浅海沉积物几乎全部是砂岩,缺少泥岩盖层,因而以前所钻4口探井都以失利告终,这也是长期在该区找不到油气田的症结,而孔雀河1井正好钻在位于北部的三角洲沉积区域,该区地层具有砂、泥互层的特点,具备了较好的储集层和局部盖层,试油结果表明有24个气层,该井的东部及东北部的三角洲区域是今后勘探的有利区域。
The paper aims to find out the reservoir-cap combination of Peacock River slope through the study of sedimentary facies and solve the problem that exploration success rate is very low for a long time, and large-sized oil and gas fields can not be found under the condition of sufficient oil and gas source. Based on the results of single-well sedimentary facies analysis, typical well core analysis, field profile data and seismic survey data, the sedimentary characteristics, evolution characteristics and plane distribution of Silurian in the Peacock River area of Tarim Basin are obtained. The sedimentary records of the Jurassic are the transitional facies of the sea-land mainly in the coastal sea-shallow sea and deltaic in the northern region. According to the single-well test-gas data, it is considered that the shallow sea sediments in this area are mostly sandstone, lack of mudstone caprock, As a result, the four drills previously drilled ended in defeat. This is also the crux of the long-term lack of access to oil and gas fields in the area. The Kongkuaihe 1 well drilled in a delta depositional area located in the north with sand and mud interbed It has good reservoirs and partial caprocks. The test results show that there are 24 gas layers. The eastern and northeastern delta of the well is the favorable prospect for future exploration.