摘要
饶阳凹陷中部油气资源丰富,环主生油洼槽发育断裂背斜构造,东营组—沙一上亚段是该区主要的含油层系。东营组—沙一上亚段主要发育曲流河沉积的河道砂体,其成藏特点主要表现为油源断层控制油气分布,河道砂体控制圈闭形成及油气富集;构造油藏与岩性油藏共生互补,断裂背斜构造高部位以构造油藏为主,翼部以岩性油藏为主,翼部岩性油藏勘探程度低、勘探潜力大。分析断层与河道砂体的配置关系,该区主要有3种成藏模式,即河道砂体侧向尖灭成藏模式、断层负地貌河道砂体上倾尖灭成藏模式、低幅度背斜形态透镜状孤立砂体成藏模式。近两年,通过构造、沉积、储层等精细研究,刻画河道砂体展布,在大王庄—肃宁构造翼部落实了一批岩性圈闭,提供钻探的饶10x、宁75等目标均已成功,取得了很好的勘探成效,展现了饶阳凹陷中部整体含油连片的良好态势。
Oil and gas resources are rich in the middle of Raoyang sag, faults and anticlines developed around main oil generating troughs, and Dongying Formation-upper submember of the first member of Shahejie Formation is the major oil-bearing series in this area. Channel sandbodies deposited by meandering river mainly developed in the Formation. Reservoir forming features are expressed by oil-source faults controlling oil and gas distribution, channel sandbodies controlling traps formation and petroleum enrichment. Structural and lithologic reservoirs co-existed and mutual-complemented. The high location of faults and anticlines is mainly structural reservoir, while the wings are lithologic reservoir with low exploration degree and great potential. Analyzing the configuration of faults and channel sandbodies, there are three main reservoir forming models in the area, i.e. channel sandbody lapout, fault negative landform channel sandbody updip pinchout, and lenticular isolated sandbody of low-amplitude anticlines. Through fine research on structure, deposit and reservoir in recent years, channel sandbody distribution was described, therefore, a series of lithologic traps were confirmed at the wings of Dawangzhuang-Suning structure, and Well Rao 10x and Well Ning75 were drilled successfully. Remarkable exploration achievements were made, which showed a good trend of oil jointing in the middle of Raoyang sag.
出处
《中国石油勘探》
CAS
2013年第6期7-12,共6页
China Petroleum Exploration
关键词
饶阳凹陷中部
河道砂体
成藏模式
圈闭识别
含油连片
middle of Raoyang sag, channel sandbody, reservoir forming model, trap recognition, oil jointing
