摘要
温吉桑地区位于丘东洼陷的南部缓坡上,其水西沟群(J1+2sh)发育一套由厚层块状砂岩和与黑色或深灰色泥岩、黑色碳质泥岩和厚层煤层互层的煤系沉积。本文利用常规测井曲线与烃源岩的有机碳含量(TOC)建立关系,对温吉桑地区烃源岩TOC进行重新计算,得出纵向上连续的、平面上可对比的TOC剖面。该区J2x1+2TOC相对最高,烃源岩品质相对最高,烃源岩厚度相对最厚,烃源岩最发育;J1b次之;J1s最差。该区靠近丘东洼陷中心,TOC越高,烃源岩越发育。该区J1s源储叠置,形成自生自储型致密岩性气藏,TOC越高,源岩越发育,油气越富集,相对产能也越高。
Wenjisang region lies in the southern glacis of Qiudong depression in which Shuixigou group consists thick-bedded massive sandstones and coal system deposits----alternating layers of dark or gray siltstones, dark carbonaceous mudstones and thick coal seams.The relationship between conventional logging curves and content of total organic carbon(TOC)of the hydrocarbon source rocks is set up in the paper. The TOC of Wenjisang region is recalculated to achive vertical distribution which is longitudinal continuous and is correlated in this region.TOC of the lower member of Sishanyao formation is the highest, the quality of these source rocks is best, the source rocks are the thickest and develop most. The source rocks of Badawan formation are the second and the ones of Sangonghe formation are the worst.The region is close to the centre of Qiudong depression. The higher TOC is, the better hydrocarbon source rocks develop.Thesource rocks and reservoirs of Sangonghe formation are vertically superposed, forming self-generated and self-contained compacted lithologic gas reservoir. The higher TOC is, the better source rocks develop, the richer hydrocarbon is, the higher productivity is.
出处
《国外测井技术》
2013年第5期30-32,3-4,共3页
World Well Logging Technology
关键词
TOC
测井
烃源岩
温吉桑地区
TOC
well logging
hydrocarbon source rock
Wenjisang region
