辽河油田锦16块兴隆台油层精细油藏描述

发布时间：2018-05-28 05:25

本文选题：精细油藏描述 + 低级序小断层　；参考：《东北石油大学》2017年硕士论文

【摘要】：随着油田开发的深入,化学驱作为注水开发接替方式,近年来国内外石油行业对化学驱越来越重视。但油藏地质体复杂,尤其是化学驱注采井间低级序断层、储层非均质性强等因素直接影响化学驱开发效果,制约了油田开发水平的持续提高。作为辽河注水开发老油田代表,近年来锦16块兴隆台油层化学驱矿场试验取得了突破性进展,是辽河油田化学驱重点区块之一。该块属于扇三角洲前缘沉积,受沉积影响兴隆台油层砂体横向上叠加连片,纵向上相互叠置,大大增加横向对比难度,直接导致化学驱注采层段不对应。同时受边界四级断层控制,区块内部伴生多条低级序断层,降低化学剂波及范围,制约化学驱效果,难以进一步提高油田开发效果。针对以上难题,本文利用前期基于目标重新处理的叠前时间偏移三维地震资料及全区整体覆盖采集的VSP测试资料,井震结合针对锦16块兴隆台油层精细油藏描述,取得以下成果:(1)充分应用区块基于目标处理的叠前时间偏移三维地震资料,结合三套区域地层对比标志层特征,通过井震结合建立区块地层对比搁架,在此基础上结合曲线旋回特征,实现小层级别精细对比。(2)开展密井网精细微构造研究,厘清区块断裂特征及微构造特征。重点刻画区块内部低级序断层,断层识别精度由原来的30米,提升至准确识别10-15米断距,微幅构造刻画精度提高至5米以内,能够满足目前化学驱对地质体研究精度需求。(3)通过岩心刻度测井,开展沉积微相研究。在精细地层对比基础上,通过岩心标定各沉积微相测井曲线特征,开展单井沉积微相研究,明确区块沉积特征。(4)通过对比注水前期、注水中期及注水后期三口取心井的岩心物性特征,明确注水前后储层孔隙度、渗透率变化规律。本文以影响锦16块兴隆台油层化学驱的地质问题为主要出发点,开展精细油藏描述,大幅度提高油藏研究精度,为全区化学驱井网扩大部署提供可靠地质依据,对提高化学驱效果有着非常重要的意义。同时该项目的研究为国内同类型油藏化学驱高效开发提供了借鉴。
[Abstract]:With the development of oil fields, chemical flooding as a replacement for water flooding, in recent years, the oil industry at home and abroad has paid more and more attention to chemical flooding. But the complexity of reservoir geological body, especially the low order fault between injection and production wells of chemical flooding, and the strong heterogeneity of reservoir directly affect the development effect of chemical flooding and restrict the continuous improvement of oilfield development level. As a representative of the old oil field of Liaohe waterflooding development, the chemical flooding field test of Xinglongtai reservoir in Block Jin 16 has made a breakthrough in recent years, and it is one of the key blocks of chemical flooding in Liaohe Oilfield. The block belongs to the fan delta front sedimentation. The sand body of Xinglongtai oil reservoir is superimposed on the horizontal by sedimentation, and overlaps with each other vertically, which greatly increases the difficulty of horizontal correlation and leads directly to the uncorrespondence of chemical flooding. At the same time, controlled by the boundary four faults, there are many low order faults in the block, which reduces the chemical agent sweep area, restricts the chemical flooding effect, and is difficult to further improve the oil field development effect. In view of the above problems, this paper uses the pre-stack time migration 3D seismic data based on target reprocessing and the VSP test data collected from the whole area covering the whole area, and combines well and earthquake with fine reservoir description for Xinglongtai reservoir in Jin16 block. The following results are obtained: 1) making full use of three dimensional seismic data of prestack time migration based on target processing, combining with the characteristics of three sets of regional stratigraphic correlation markers, establishing the block stratigraphic correlation shelf by combining well and earthquake. On this basis, combining with the curve cycle characteristics, the fine correlation of substratum level is realized. (2) the fine microstructures of dense well pattern are studied, and the fault and microstructural characteristics of blocks are clarified. The low order fault inside the block is described emphatically, and the accuracy of fault identification is raised from 30 meters to 10 to 15 meters accurately, and the precision of micro-structure description is improved to less than 5 meters. It can meet the need of chemical flooding for geological body research precision. 3) through core calibration logging, depositional microfacies research can be carried out. On the basis of fine stratigraphic correlation, through the core calibration of the characteristics of each sedimentary microfacies logging curve, the study of single well sedimentary microfacies is carried out. The characteristics of core physical properties of three coring wells in the middle and late stages of water injection are used to determine the variation of reservoir porosity and permeability before and after injection. Based on the geological problems affecting chemical flooding in Xinglongtai reservoir of Block Jin16, this paper develops fine reservoir description, greatly improves the research precision of reservoir, and provides reliable geological basis for the expansion and deployment of chemical flooding well network in the whole area. It is very important to improve the effect of chemical flooding. At the same time, the research of this project provides a reference for the chemical flooding of the same type reservoirs in China.
【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

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