张强凹陷北部地区低孔渗储层测井综合评价

发布时间：2018-11-09 12:25

【摘要】：随着油气田勘探开发的逐步推进,各类型的复杂油气藏变成了现今的主要勘探目标,低孔低渗油藏是复杂油气藏的一种,具有很大的开发潜力。本次研究的目标区张强凹陷北部地区属于中-低孔隙、低或特低渗储层,断块较多,构造复杂,储层条件较差,非均质性较强。研究区内老井较多,受到当时测井工艺及解释方法的限制,测井项目较少,资料相对较匮乏,流体识别及油水层解释精度不高。针对上述情况,本次研究通过对岩心资料进行分析,结合测井曲线,利用交会图技术及经验公式分别建立了沙海组、九佛堂组及义县组的测井解释模型,并进行了岩性识别及归类,给出了相应的岩性划分标准。根据解释模型计算出的孔隙度、渗透率、饱和度确定了储层的物性及含油性,同时利用测井曲线结合录井及试采资料建立了工区电性解释标准,依据该解释标准主要对沙海组上段、下段及义县组储层进行了二次精细解释,共计完成62口井的评价工作,累计解释层数为181层,累计厚度达960.3m。通过区域井间地层对比,进行了张强凹陷北部地区的油水分布规律研究,结果表明:九佛堂组地层缺失严重,油层主要发育在构造高部位的义县组及构造低部位的沙海组。根据目前的勘探开发情况,作了研究区内的潜力层分析,对潜力较大的义县组提出5口井试油建议,若试油成功,将至少增加油层厚度376m,将为油田增储上产提供依据和保障。
[Abstract]:With the development of exploration and development of oil and gas fields, various types of complex reservoirs have become the main exploration targets. Low porosity and low permeability reservoirs are one of the complex reservoirs with great potential for development. The northern area of Zhang Qiang depression in this research area belongs to medium-low porosity low or ultra-low permeability reservoirs with more fault blocks complex structures poor reservoir conditions and strong heterogeneity. There are many old wells in the study area, which are limited by the logging techniques and interpretation methods at that time. The logging items are less, the data are relatively scarce, and the accuracy of fluid identification and oil-water reservoir interpretation is not high. In view of the above situation, the logging interpretation models of Si formation, Jiufutang formation and Yixian formation were established by analyzing the core data and combining well logging curves with cross plot technique and empirical formula. Lithology identification and classification are carried out, and the corresponding lithologic classification standards are given. According to the porosity, permeability and saturation calculated by the interpretation model, the physical properties and oil-bearing properties of the reservoir are determined. At the same time, the electrical interpretation standard of the working area is established by combining the logging curve with the logging and production test data. According to this interpretation criterion, the reservoir in the upper, lower and Yixian formation of Si formation was mainly interpreted for two fine times, and 62 wells were evaluated. The accumulative interpretation layer was 181 layers and the cumulative thickness was 960.3 m. Based on the regional cross-well stratigraphic correlation, the oil and water distribution in the northern part of Zhang Qiang depression is studied. The results show that the formation of Jiufutang formation is seriously missing, and the reservoir is mainly developed in Yixian formation of high structural position and Si formation in low part of structure. According to the present situation of exploration and development, this paper makes an analysis of potential layers in the study area, and puts forward five well test suggestions for Yixian formation with great potentiality.If the oil testing is successful, the thickness of the reservoir will be increased at least 376m, which will provide the basis and guarantee for the increase of reservoir and production in the oil field.
【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;P631.81

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