渤海湾盆地JX凹陷陡坡带砂砾岩体分布特征与油气成藏条件
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摘要
JX凹陷位于渤海湾盆地冀中坳陷西南部。由于陆相断陷湖盆陡坡带特殊的构造背景,沉积地层中各种成因的砂砾岩体极为发育,是油气勘探的重要目标。但其分布特征和油气成藏条件不清一直制约着勘探开发工作。本文通过对地震资料研究发现在NJ断裂地区发育椅状、铲式、坡坪式三种类型的陡坡带,综合利用地震、录井、测井等资料信息,结合有关地质资料确定了砂砾岩体形态特点,纵向分布和平面展布特征,以及陡坡带砂砾岩体的油气成藏条件。
The JX sag is located in the southwestern part of Jizhong depression in Bohai bay basin. Due to the special tectonic setting of the abrupt slope belt of the land facies fault lake basin,the sandy conglomerate body of various genesis in the sedimentary strata are extremely developed, which is an important target for petroleum exploration. However, its distribution characteristics and unclear hydrocarbon accumulation conditions have restricted the petroleum exploration. The study of seismic data showed that three types of abrupt slope belt, including chair-like, shovel-like and ramp-flat fault, are developed in the NJ fault area. The seismic information, relevant geological data and logging curves were comprehensively used to determine the morphological characteristics,longitudinal distribution and plane distribution characteristics of the sandy conglomerate body, and the hydrocarbon accumulation conditions of the sandy conglomerate bodys in the abrupt slope belt.
The JX sag is located in the southwestern part of Jizhong depression in Bohai bay basin. Due to the special tectonic setting of the abrupt slope belt of the land facies fault lake basin,the sandy conglomerate body of various genesis in the sedimentary strata are extremely developed, which is an important target for petroleum exploration. However, its distribution characteristics and unclear hydrocarbon accumulation conditions have restricted the petroleum exploration. The study of seismic data showed that three types of abrupt slope belt, including chair-like, shovel-like and ramp-flat fault, are developed in the NJ fault area. The seismic information, relevant geological data and logging curves were comprehensively used to determine the morphological characteristics,longitudinal distribution and plane distribution characteristics of the sandy conglomerate body, and the hydrocarbon accumulation conditions of the sandy conglomerate bodys in the abrupt slope belt.
引文
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