长岭断陷致密气储层特征及成藏规律研究

发布时间：2018-01-28 14:09

本文关键词： 长岭断陷营二段登娄库组致密气成藏　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：长岭断陷沉积两套地层,断陷期地层和坳陷期地层。长岭断陷由乾北、大安、前神子井、哈什坨、黑帝庙、哈尔金、伏龙泉七个次级洼槽组成,深层主要为断陷期沉积的湖沼相砂泥岩煤系地层。浅层受松辽盆地坳陷期演化控制,沉积以河流相、三角洲相为主的砂泥岩地层。长岭断陷资源丰富,但是除伏双大地区外,深层碎屑岩埋深大,储层物性差,动用成本高,技术难度大,基础研究薄弱。本次研究主要目的是重新评价长岭断陷及预探外围断陷,落实致密气及火山岩勘探潜力。通过对长岭断陷登娄库组、营二段致密砂岩储层特征及主控因素分析,以及长岭断陷致密砂岩气藏成藏规律研究,形成致密砂岩气成藏模式。通过成藏模式的应用,首先预探伏龙泉断陷,F14井营城组获得高产气流,揭示原生气藏勘探新领域。伏龙泉洼槽发育三个次级洼槽,同时受控于伏龙泉断裂。发育营城组、沙河子组和火石岭组三套暗色泥岩以及火石岭组煤层共四套烃源岩,整体具有较好的生烃能力;其中南部洼槽后期反转作用弱,后期断裂不发育,是寻找原生气藏的首选区带;中部洼槽后期反转作用强,但营城组下部及沙河子组物性较差,具备形成致密砂岩气藏的条件。其次,进一步评价大安断陷天然气成藏条件。通过与邻区开展对比,认为大安断陷营城组、沙河子组、火石岭组地层相对落实,可能发育较好的烃源岩,且发育多种类型圈闭,保存条件好,是寻找致密气的有利区。
[Abstract]:The Changling fault depression consists of seven sub-troughs: Qianbei, Da'an, Qianshenzi well, Hashi Tuo, Heidimiao, Haljin and Fulongquan. The deep layer is mainly lacustrine marsh facies sand mudstone coal measure strata. The shallow layer is controlled by Songliao basin depression stage evolution, the deposition is dominated by river facies, delta facies sand and mudstone strata. Changling fault depression is rich in resources. But with the exception of Fuduangda area, deep clastic rock is buried deep, reservoir physical property is poor, production cost is high, technology is difficult and basic research is weak. The main purpose of this study is to re-evaluate Changling fault depression and pre-exploration peripheral fault depression. In order to realize the exploration potential of dense gas and volcanic rocks, the characteristics and main controlling factors of tight sandstone reservoirs in Changling fault depression, the Denglooku formation of Changling fault depression and the reservoir forming regularity of tight sandstone gas reservoirs in Changling fault depression are analyzed. Through the application of the reservoir forming model, the high-yield airflow was obtained in the Yingcheng formation of Ying-cheng formation of F14 well in the F14 fault depression. It reveals the new exploration field of primary gas reservoir. Three secondary troughs are developed in the Fulong Quan depression, which is controlled by the Fulong Quan fault and the development of Yingcheng formation at the same time. Three sets of dark mudstone and four sets of source rocks of Shahezi formation and Huoshiling formation and coal seam of Huoshiling formation have good hydrocarbon generation ability. The late inversion of the southern depression is weak, and the late fault is not developed, so it is the preferred zone to find the primary gas reservoir. The inversion is strong in the late stage of the central depression, but the physical properties of the lower part of Yingcheng formation and Shahezi formation are poor, which has the condition of forming tight sandstone gas reservoir. Secondly. Through the comparison with adjacent areas, it is considered that the formation of Yingcheng formation, Shahezi formation and Huosiling formation in Da'an fault depression is relatively practical, and that good hydrocarbon source rocks may be developed. Moreover, many types of traps are developed and the preservation conditions are good, which are favorable areas for searching for dense gas.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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