廊固凹陷油气成藏模拟研究

发布时间：2018-04-15 22:24

本文选题：廊固凹陷 + 油气成藏　；参考：《东北石油大学》2017年硕士论文

【摘要】：廊固凹陷是渤海湾盆地冀中拗陷北部的五个富油气凹陷之一。经过五十多年的勘探研究工作,探明了七个油气田,同时也取得了多项成果与认识。然而,随着勘探程度的提高,勘探难度也越来越大,勘探领域及油气藏类型也在不断转变。在这种现状下,传统的油气地质研究已不能满足当前的生产需要,而是要求有更先进的研究方法及技术手段,才有可能取得勘探新进展。本研究通过利用廊固凹陷三维大连片地震数据平台和以往的综合研究成果,在精细构造解释基础上,通过层位和断层的拼接处理,建立三维构造模型;采用先进的测井评价烃源岩技术,结合沉积相展布,确定烃源岩模型;利用储层预测技术,建立储层模型;针对工区地层剥蚀特点,采用测井声波时差曲线法、地震反射趋势法和沉积边界法,综合确定地层剥蚀量,建立构造演化模型;通过储层、断层和不整合研究,建立输导体系模型;将所有模型有机的整合为一体,形成研究区的三维综合地质模型。综合古热流和断层活动性研究结果,对地温场、地应力场和地压场等“三场”进行定性定量分析,模拟再现油气生、排、运、聚、散的动态过程,理清了廊固凹陷的油气资源潜力,优化了勘探方向,对下步有利的油气勘探层系和区带的选择,具有一定的指导作用。通过油气成藏模拟研究认为廊固凹陷具有油气成藏的良好资源基础,整个油气资源量较过去成倍增长。与三次资源评价结果相比,本次模拟的生烃量和资源量都有大幅增加,但是凹陷油气资源分布空间差异明显,首先,各区带资源量存在明显差异,大柳泉鼻状构造带油气最为富集,河西务构造带次之;其次,各层系的油气分布差异大,石油资源量主要集中在沙三中段至沙四上段,天然气资源量主要集中在沙三中段和前古近系;研究表明大柳泉构造带和河西务构造带是剩余石油资源量的主要分布区,其中沙三上亚段中,琥珀营地区滚动探明、柳泉东—王居新增探明的潜力很大;固安背斜和琥珀营地区的沙三中段是尚待进一步发现的新区;沙三下段是柳泉构造带最有利油气资源接替层系;河西务构造带沙四中下亚段是廊固凹陷重要的长远石油资源接替区与接替目的层;另外该区的复杂断块和潜山领域仍有巨大勘探潜力。
[Abstract]:Langgu depression is one of the five oil and gas rich sag in the north of Jizhong depression in Bohai Bay basin.After more than 50 years of exploration and research, seven oil and gas fields have been proved, and many achievements and understandings have been obtained.However, with the improvement of exploration degree, the exploration is becoming more and more difficult, and the exploration field and the types of oil and gas reservoirs are changing constantly.In this situation, the traditional oil and gas geological research can not meet the current production needs, but requires more advanced research methods and technical means, so it is possible to make new progress in exploration.In this study, the 3D structural model is established by using the seismic data platform of the three dimensional Dalian slice in the Langgu depression and the previous comprehensive research results, on the basis of fine structural interpretation and through the splicing of the strata and faults.Using advanced logging to evaluate source rock, combining sedimentary facies distribution to determine source rock model; using reservoir prediction technology to establish reservoir model; according to the characteristics of strata denudation in working area, using logging sonic moveout curve method,Seismic reflection trend method and sedimentary boundary method, synthetically determine the amount of strata erosion, set up structural evolution model; through reservoir, fault and unconformity study, establish the model of transportation system; integrate all the models into one organic whole,To form a three-dimensional comprehensive geological model of the study area.Based on the results of paleo-heat flow and fault activity, the "three fields" of geothermal field, in-situ stress field and ground pressure field are analyzed qualitatively and quantitatively to simulate and reproduce the dynamic process of oil and gas generation, drainage, migration, accumulation and dispersion.The paper clarifies the potential of oil and gas resources and optimizes the exploration direction in Langgu Sag, which has a certain guiding effect on the selection of favorable oil and gas exploration strata and zones in the next step.Through the simulation of oil and gas accumulation, it is considered that the Langgu depression has a good resource base for oil and gas accumulation, and the total oil and gas resources are increased exponentially compared with the past.Compared with the results of three resource evaluation, the hydrocarbon generation and resource quantity of this simulation are all increased significantly, but the spatial distribution of oil and gas resources in the sag is obviously different.Daliuquan nose structural belt is the most abundant in oil and gas, followed by Hexiwu structural belt. Secondly, the distribution of oil and gas varies greatly among the layers, and the oil resources are mainly concentrated in the middle part of Sha 3 to the upper part of Sha 4.The study shows that the Daliuquan structural belt and the Hexiwu structural belt are the main distribution areas of the remaining petroleum resources.There is great potential for new discovery in Dong-Wangju of Liuquan, the middle section of Sha 3 in Guan anticline and Amber Ying area is a new area to be discovered further, the lower part of Sha 3 is the most favorable oil and gas resources replacement series in Liuquan structural belt.The middle and lower member of Sha 4 in the Hexiwu structural belt is an important long-term petroleum resource replacement area and replacement target layer in Langgu Sag, and the complex fault blocks and buried hill areas in this area still have great exploration potential.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

【相似文献】