饶阳凹陷潜山勘探新进展及新认识

Progress in Exploration of Deep Buried Hill in Raoyang Sag

饶阳凹陷历经30多年的勘探历程,规模大、埋藏浅、构造简单的潜山油藏均已被发现。经过近几年的潜山研究及成藏条件分析,饶阳凹陷还具有较大的勘探潜力,还有许多深小潜山、潜山内幕等其他类型的潜山圈闭需要深化研究和评价。长洋淀潜山构造带和肃宁潜山构造带勘探程度较低,成藏条件复杂,勘探工作一度停滞。2006年华北油田把深潜山领域重新列为重点勘探领域,加强潜山勘探,长洋淀潜山构造带和肃宁潜山构造带被列为重点勘探区带,工作中充分利用新采集的三维地震资料,精细落实潜山圈闭,从老资料入手,通过寻找新线索产生新认识,老井重新复查解决疑难问题,层位追踪对比确定潜山层位,抓住成藏关键因素,加强油源评价,创新地质认识,构建潜山成藏模式等手段,发现落实了长3井、长6井及宁古8x井潜山圈闭,经钻探均获高产油气流,实现了潜山勘探的新突破。

After 30 years of exploration in Raoyang sag, the buried hill reservoir featuring in large scale, shallow depth, and simple structure has been discovered. Buried hill study and analysis of reservoir accumulation conditions in the past few years indicate that Raoyang sag has huge exploration potential and a lot of small and deep buried hill traps, internal traps of buried hills and other types of buried hill traps need to be further studied and evaluated. Changyangdian buried hill structural belt and Suning buried hill structural belt have low exploration degree and complicated reservoir accumulation conditions, so the exploration work has been stagnant at one time. In 2006, Huabei Oilfield Company laid emphasis on the exploration of deep buried hills, listing Changyangdian and Suning buried hill structural belts as key exploration zone, fully using newly acquired 3D seismic data to find buried hill traps. Beginning with the old data, through finding out new hints to develop new recognitions, re-examining old wells to solve difficulties, identifying buried hill horizons through strata contrast and tracking, focusing on the key of reservoir accumulation, reinforcing evaluation on oil sources, creating new geological cognitions, building buried hill reservoir accumulation models, the company discovered buried hill traps in Chang 3, Chang 6 and Ninggu 8x wells. After drilling, high-production commercial oil and gas flow is gained, and new breakthroughs in buried hill exploration are fulfilled.