滨里海盆地B区块KT2段储层预测及目标优选

发布时间：2018-11-15 07:30

【摘要】：滨里海盆地B区块经过多年的勘探工作,全区已经被常规三维地震资料所覆盖,并利用常规地震资料发现了特鲁瓦油田大型油气田。随着特鲁瓦西斜坡大型构造-岩性油气藏勘探的重大突破,为更好的开展特鲁瓦西斜坡储层及油藏的评价工作,提高该区的钻井成功率,在特鲁瓦西斜坡部署了宽方位、宽频带、高密度的高精度三维地震资料。本课题以高精度三维地震资料为基础,针对重点勘探层系石炭系KT2段г2油组开展工作,并针对高精度三维地震资料的三个特点展开研究工作,首先利用高精度成像资料资料开展精细构造解释,在此基础上,运用高密度速度谱建立速度场开展时深转换,落实了主力含油层系KT2段г2油组顶界构造特征为东南高、西北低的大型宽缓鼻状构造;其次运用宽频带数据中的低频成分开展低频反演预测储层,落实了г2油组储层分布特征,反演结果表明г2油组储层主要分布在区块中部,呈北东向条带状分布,反演结果与已钻井吻合程度较高;然后运用分方位信息开展各项异性分析和裂缝预测工作,明确了г2油组顶面主要发育两组裂缝,裂缝走向以北东向和北西向为主,裂缝主要发育在盐丘发育的区域,与盐丘的分布息息相关;最后运用低频地震信息开展油气检测分析,落实有利含油气区带,并最终预测研究区油气主要分布在区块东部,三个北东走向的条带内。最终通过综合分析优选出有利勘探区带,并在有利勘探区内优选建议井位8口。
[Abstract]:After many years of exploration work in B block of the coastal Caspian basin, the whole area has been covered by conventional 3D seismic data, and the large oil and gas fields in Troy oilfield have been discovered by using conventional seismic data. With the major breakthrough in the exploration of large-scale tectonic-lithologic reservoirs on the Trulwaxi slope, in order to better carry out the evaluation of the reservoirs and reservoirs on the Trulwaxi slope and to improve the success rate of drilling in this area, a wide azimuth has been deployed in the Trulwaxi slope. Wide-band, high-density, high-precision three-dimensional seismic data. On the basis of high precision 3D seismic data, this project is aimed at the key exploration of the oil formation of KT2 formation of Carboniferous system, and the three characteristics of high precision 3D seismic data, and the research work is carried out in the light of the three characteristics of the high-precision 3D seismic data. Firstly, fine structural interpretation is carried out by using high-precision imaging data. On the basis of this, the time-depth transformation of velocity field is established by using high-density velocity spectrum, and the structural characteristics of the top boundary of the main oil-bearing formation KT2 formation are high in the southeast. A large, broad, slow nose structure with low in the northwest; Secondly, the low frequency inversion is used to predict the reservoir by using the low frequency component of the broadband data, and the reservoir distribution characteristics of the No. 2 oil group are carried out. The inversion results show that the reservoir of the No. 2 oil group is mainly distributed in the middle of the block, and the reservoir is distributed in the north-east direction. The inversion results are in good agreement with the drilling results. Then using the azimuth information to carry out the heterogeneity analysis and fracture prediction work, it is clear that two groups of fractures are mainly developed on the top surface of the No. 2 oil formation, the strike of the fractures is mainly in the north east and the north west, and the fractures are mainly developed in the areas where the salt dunes are developed. Is closely related to the distribution of salt dunes; Finally, using low-frequency seismic information to carry out oil and gas detection and analysis, the favorable oil-gas zone is implemented, and finally the oil and gas distribution in the study area is mainly in the eastern part of the block and in the three north-east strike zones. Finally, the favorable exploration zone is selected through comprehensive analysis, and 8 wells are suggested to be selected in the favorable exploration area.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P618.13

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