海安凹陷复杂断块圈闭精细识别研究

发布时间：2018-03-07 13:23

本文选题：海安凹陷　切入点：泰州组　出处：《中国石油大学(华东)》2015年硕士论文　论文类型：学位论文

【摘要】：海安凹陷是江苏油田实现油气增储上产的重点地区,但随着成熟老区勘探程度的提高,勘探领域由简单构造圈闭向复杂、隐蔽圈闭领域转变,发现、落实有利圈闭的难度逐渐加大,对圈闭识别的技术方法也有了更高的要求。本文主要根据凹陷已有地震、地质、测井及分析化验资料,深入开展圈闭识别研究,按照构造圈闭、隐蔽圈闭及浅层构造圈闭三部分展开,其中泰州组圈闭识别是本文研究重点,主要取得了以下成果:1.针对泰州组构造油藏油气运聚有利区带,开展构造样式分析及断层综合解释,理顺不同序级断层组合关系,通过地震正演、相干体、数据融合等技术,明确泰州组T40地震反射层反射特征及微小断层的识别,对该地震反射层进行精细解释,发现和落实小断层(微断距)控藏圈闭。2.针对泰州组隐蔽油气藏,在砂组精细对比基础上,结合沉积微相研究和砂体展布特征分析,厘清泰州组砂体发育规律,通过地震属性提取、分频处理、波阻抗反演等技术识别隐蔽圈闭。3.通过对海安凹陷各次凹浅层的研究,结合曲塘次凹的发现成果,主要优选了和其具有相似成藏条件的地区,开展构造精细解释,落实浅层的有利目标区和目标块。4.针对不同层系、不同类型圈闭进行评价优选,提供钻探目标。通过采用针对性的技术手段和方法,在该区解释三维地震1104.09 km2,二维地震150km,并对几个重点区域进行了隐蔽圈闭的预测,发现了一批有利的构造圈闭和断层-岩性圈闭,为海安凹陷下步勘探提供有力保障。同时也建立了一套适合海安凹陷的小断层及隐蔽圈闭预测的方法和技术流程。
[Abstract]:Haian sag is the key area in Jiangsu oil field to increase oil and gas reservoir, but with the improvement of exploration degree in mature old area, the exploration field changes from simple structural trap to complex, subtle trap, and it is found that, The difficulty of implementing favorable traps is gradually increasing, and the technical methods of trap identification have higher requirements. Based on the existing seismic, geological, logging and analytical laboratory data in the sag, the study of trap identification is carried out in depth, according to the structural trap. There are three parts of subtle traps and shallow structural traps, among which, the identification of Taizhou formation traps is the focus of this paper, and the following results have been obtained: 1. In view of the favorable zones of hydrocarbon migration and accumulation in structural reservoirs of Taizhou formation, Structural style analysis and comprehensive interpretation of faults are carried out to straighten out the relationship of fault combinations of different order levels. By means of seismic forward modeling, coherent volume, data fusion and other techniques, the reflection characteristics of seismic reflection layer T40 and the identification of small faults in Taizhou formation are clarified. The fine interpretation of the seismic reflection layer and the discovery and implementation of the small fault (micro-fault) controlled reservoir trap .2. aiming at the subtle reservoirs of Taizhou formation, on the basis of fine correlation of sand formation, combined with sedimentary microfacies study and sand body distribution characteristics analysis, To clarify the regularity of sand body development in Taizhou formation, identify hidden traps by seismic attribute extraction, frequency division processing, wave impedance inversion and so on. 3. Through the study of shallow layers of each depression in Haian sag, combined with the discovery results of Qutang subconcave, The main areas with similar reservoir forming conditions are selected to carry out fine structural interpretation, to implement the favorable target area and target block of shallow layer .4.To evaluate and select different types of traps according to different strata and different types of traps, To provide drilling targets. Through the use of targeted technical means and methods, this paper interprets 3D earthquakes 1104.09 km2 and two-dimensional earthquakes 150km2 in this area, and predicts hidden traps in several key areas. A number of favorable structural traps and fault-lithologic traps have been found, which provide a strong guarantee for the next step exploration in Haian Sag. At the same time, a set of methods and technical processes for prediction of small faults and subtle traps suitable for Haian Sag have been established.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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