CAJ | 학술논문

中国西部三塘湖盆地深层石炭系属海相沉积,埋深大,火山岩发育,物探技术对复杂石炭系内幕结构认识不清,制约了勘探进程.石炭系火成岩电阻率明显高于砂泥岩,具备通过电性变化进行识别的条件.人工场源电磁法-建场测深通过改进仪器、野外采集技术,采用与地震联合的二维约束反演技术,提高了探测深度和深层分辨率,清楚地揭示上石炭统上、下火山岩为主的二套层系间存在一套哈尔加乌组低阻碎屑岩层,并圈划出分布范围.此范围确定的马20井钻探结果证实,哈尔加乌组是以碎屑岩为主的烃源层.在马36井获得高产,针对石炭系内幕低阻层系烃源岩勘探取得突破.
중국서부삼당호분지심층석탄계속해상침적,매심대,화산암발육,물탐기술대복잡석탄계내막결구인식불청,제약료감탐진정.석탄계화성암전조솔명현고우사니암,구비통과전성변화진행식별적조건.인공장원전자법-건장측심통과개진의기、야외채집기술,채용여지진연합적이유약속반연기술,제고료탐측심도화심층분변솔,청초지게시상석탄통상、하화산암위주적이투층계간존재일투합이가오조저조쇄설암층,병권화출분포범위.차범위학정적마20정찬탐결과증실,합이가오조시이쇄설암위주적경원층.재마36정획득고산,침대석탄계내막저조층계경원암감탐취득돌파.
In STH basin of western China develops Carboniferous formations with marine facies in deep underground and in the formations exists volcanic rock widely.Traditional prospecting ways give no definite description about the in-ner structures and resource rock which is mainly composed of clastic rock.Available data in the area shows that Carbonif-erous igneous rock shows apparently higher resistivity than sandslime,so it is possible to detect igneous mass by making use of the resistivity contrast.In recent years, controlled source techniques are greatly improved on acquisition meters and methods.2D inversion of controlled source EM data with seismic data as constraint increases sounding depth and im-proves resolution of deep structure interpretation.With the progress, igneous mass in STH basin is described more de-tailedly. The project reveals that between the upper volcanics and the lower one exists a low-resistivity clastic formation C2h within the upper Carboniferous system. The formation is finally delineated. Well M20 is drilled subsequently, and the drilling result discovers that the C2h formation is a set of carbonaceous mudstone and grey basalt, which is hydrocar-bon source rock with the major content of clastic rock. Following well M20,another well M36 is designed based on the interpretation of the project and drilled. This well produces commercial petroleum.This project made progress in the pros-pecting of low resistivity source rock within Carboniferous formation.