古龙油田古59区块葡1油层组地震精细解释及构造特征研究

发布时间：2018-06-07 23:48

本文选题：古龙油田 + 葡萄花油层　；参考：《成都理工大学》2015年硕士论文

【摘要】：葡萄花油层发育于姚家组一段地层中,为松辽盆地主力产层。古龙油田横跨齐家-古龙凹陷与龙虎泡-大安阶地两个二级构造单元,主体位于泰康隆起和大庆长垣所夹持的南北向长轴向斜构造内。整体构造趋势中间低两侧高。古59区块位于古龙油田东南部。通过对古龙油田古59区块葡萄花油层的构造特征进行精细研究,不仅有利于该区的油气勘探与开发,同时也对整个大庆长垣南部地区的油气勘探有着实际意义。本次研究在原始资料分析基础上,针对静校正、提高分辨率、保护有效信号、消除纵横向能量差别及偏移成像等处理的重、难点,采用表层模型约束的组合静校正、分步多域保幅去噪、地表一致性振幅补偿、炮检域两步法地表一致性反褶积和叠前时间偏移等技术,取得良好效果。新处理成果目的层反射能量强,信噪比高,波组特征明显,层间信息丰富,构造特征明显,断点、断面清晰。本文运用构造地质学、沉积学、石油地质学等多学科理论,在全面总结前人研究成果的基础上,综合利用三维地震、地质、测井、岩心等资料,选取工区内56口井,经严格质量控制制作了人工合成地震记录,对葡一油层组进行标定；通过地震地质层位的标定,确定了该工区内各地质层位的地震反射特征；经过反复的地层对比,结合地震剖面特征,依据井震标定的葡萄花油层组地震反射特征,搭建精细构造格架,在此基础上,根据标准剖面,对各目的层地层和断裂进行全区的追踪对比解释；采用了固定v0、变p的变速成图方法,求取三维空间的速度场,由此进行时深转换,编制了葡萄花油层构造图；在编制葡萄花油层砂层组顶底界面构造图的基础上完成了各砂层组的地层厚度图。通过对研究区构造精细研究,识别圈闭7个,累计面积25.29 km2,划分出四种类型的圈闭：断块、断背、断鼻和背斜,以断鼻和断块型圈闭为主。区内共解释断层63条,主要为正断层,断层走向以北西西向和北北西向为主；北北西向断层延伸较长,北西西向断层延伸较长相对较短。断层在纵向上主要发育于嫩江组至青山口组地层,以地堑、地垒为主；平面上北西西向断层切割北北西向和北北东向断层,北西西向断层相对发育较早。
[Abstract]:The Putaohua reservoir, which is the main reservoir in Songliao Basin, is developed in the first member of the Yao formation. Gulong Oilfield spans two secondary tectonic units, Qijia-Gulong Sag and Longhu Po-Da 'an terrace, the main body of which is located in the north-south syncline structure of Taikang uplift and Daqing Placanticline. The overall tectonic trend is low and high on both sides of the middle. Block 59 is located in the southeast of Gulong Oilfield. By studying the structural characteristics of Putaohua formation in Gu59 block of Gulong Oilfield, it is not only beneficial to oil and gas exploration and development in this area, but also of practical significance to oil and gas exploration in the south of Daqing Placanticline. Based on the analysis of the original data, the combined static correction with surface model constraint is used to solve the problems of static correction, improving resolution, protecting effective signal, eliminating the difference of longitudinal and transverse energy and migration imaging. The techniques such as multi-domain amplitude preserving de-noising, surface consistency amplitude compensation, two-step ground consistency deconvolution and prestack time migration in the prestack region are obtained. The new processing results show that the target layer has strong reflection energy, high signal-to-noise ratio (SNR), obvious wave group characteristics, abundant information between layers, obvious structural features, clear fracture points and clear sections. Based on the theories of structural geology, sedimentology, petroleum geology and so on, on the basis of summing up the previous research results, this paper synthetically utilizes the data of 3D earthquake, geology, logging, core and so on, and selects 56 wells in the working area. Through strict quality control, artificial synthetic seismic records were made to calibrate the Puyi oil reservoir group, through the calibration of the seismic geological layer, the seismic reflection characteristics of each geological layer in the area were determined. After repeated stratigraphic correlation, Combined with seismic profile characteristics, according to seismic reflection characteristics of Gaohua formation calibrated by well earthquake, fine structural framework was built. Based on this, according to the standard section, the whole area of target strata and faults were interpreted by tracing correlation. The variable velocity mapping method of fixed v0 and variable p is used to obtain the velocity field in three dimensional space, and the time-depth transformation is carried out, and the structural map of grape flower reservoir is compiled. On the basis of compiling the structure map of the top and bottom interface of the sand formation of the Putaohua reservoir, the formation thickness map of each sand formation has been completed. Seven traps with an accumulative area of 25.29 km ~ 2 were identified, and four types of traps were divided into four types: fault block, back fault, fault nose and anticline, mainly faulted nose and block trap. There are 63 faults in the area, mainly normal faults, the strike of which is mainly NW and NNW, and NNW extends longer than NW, NW is relatively short. The fault is mainly developed from Nenjiang formation to Qingshankou formation with graben and barrier in longitudinally, and the NW-trending fault cuts NNW and NNE faults on the plane, and the NW-trending fault develops relatively early.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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