基于三维地震解释技术的古潜山钻探目标优选

随着我国油气田勘探开发的不断深入,所面对的勘探开发对象越来越复杂,需要寻找的圈闭越来越小、越来越隐蔽,对地震资料的成像精度、分辨能力要求也越来越高。潜山储集层作为油气聚集和埋藏的重要场所之一,往往具有丰富的地质储量,但其地质构造情况复杂、裂缝发育,具有很强的非均质性,从而导致潜山油气勘探难度较高。以华北某油田潜山及潜山内幕为研究对象,在三维地震资料基础之上,通过开展精细三维地震解释、地震属性分析和地震波吸收系数分析等工作,深入研究了该区潜山及内幕的构造、裂缝发育情况、吸收系数等。研究认为,古潜山裂缝发育、储集性能良好,钻探有利区域应为中高构造部位,并通过进一步研究论证,分别就潜山面及潜山内幕提出了两口滚动开发井井位。

Optimizing Drilling Target in Buried Hill Based on 3D Seismic Interpretation

Along with further E P of China＇s oil and gas, our facing aims become more and more complex, and traps which we search for become not only smaller and smaller but also more buried. So, higher imaging accuracy and resolution are needed for seismic-data interpretation. Buried hill reservoir is one of the most important places for oil and gas accumulation and bury, resulting in abundant geological reserves found. This kind of reservoir is characterized by complex geological structure, developed fractures, and strong heterogeneous, which may bring about higher difficulty in its exploration. This study takes the buried hill and inner buried hill of one oilfield in north China as an example. We implemented fine 3D seismic interpretation of both seismic-attribute and seismic-wave adsorption-coefficient based on 3D seismic data, and explored the structure, fracture development, and adsorption coefficient. Results show that（1）in the buried hill, fractures are well developed and reservoir properties are better; and（2）the favorable zone for drilling should be located at middle to high tectonic positions. Finally, a suggestion on the well site of two rolling development wells is made.