定边油区长2低阻油藏识别及产能预测

发布时间：2019-04-23 10:34

【摘要】：随着勘探认识加深、勘探技术的不断提高,延长油田新老油区中不断有相对低电阻率油层被发现,按地层发育走向从延安组延6、延8、延10；到延长组长2、长4+5、长6等油层组均有发现。但随着鄂尔多斯盆地中生界石油勘探生产程度加深,地质情况越来越复杂,过去作为判别油气水层主要依据的双感应—八测向测井方法,越来越难以满足复杂地质条件勘探开发需要,测井解释过程中将油气层解释为水层现象时有发生,对低阻油层特征,判别标准的认识不足导致测井解释评价困难,使该类油层识别成功率较低,制约了低阻油藏勘探及开发。本文针对低阻油藏识别困难,缺乏有效识别低阻储层流体性质手段,以定边油区延长组长2低阻油藏为典范,通过对低阻油藏开展系统性探索研究,确定其油藏成因,宏观和微观影响因素,摸清形成机理,总结低阻油层特征,形成一套低阻油层识别确定行之有效的测井解释研究方法,以期提高测井解释符合率,提高低阻油层解释精度,以便发现更多低阻油层。本文对研究区块长2低阻储层进行了产能预测,并用该地区的16口未参与公式计算的井对公式进行了实例应用。
[Abstract]:With the deepening of exploration knowledge and the continuous improvement of exploration technology, relatively low resistivity reservoirs have been discovered in the new and old oil areas of Yanchang Oilfield, which have been extended from Yanan formation to 6, 8 and 10 according to the development trend of strata. To Yanchang 2, Chang 45, Chang 6 are all found. However, with the deepening of oil exploration and production in Mesozoic in Ordos Basin, the geological situation is becoming more and more complex. In the past, as the main basis for distinguishing oil, gas and water zones, the double-induction-eight-direction logging method was used. It is more and more difficult to meet the needs of exploration and development under complex geological conditions. In the process of logging interpretation, the interpretation of oil and gas reservoirs as water layers occurs from time to time. The lack of understanding of the characteristics and discrimination criteria of low resistivity reservoirs leads to difficulties in log interpretation and evaluation. The success rate of the reservoir identification is low, which restricts the exploration and development of the low resistivity reservoir. In view of the difficulty in identifying low-resistivity reservoirs and the lack of effective means to identify the fluid properties of low-resistivity reservoirs, this paper takes Yanchang-2 low-resistivity reservoir in Dingbian oil area as an example, through systematic exploration and research on low-resistivity reservoirs, and determines the formation of the low-resistivity reservoirs. Macro-and micro-factors, understanding the formation mechanism, summarizing the characteristics of low-resistivity reservoirs and forming a set of effective logging interpretation research methods for identification and determination of low-resistivity reservoirs, in order to improve the coincidence rate of logging interpretation and improve the interpretation accuracy of low-resistivity reservoirs. In order to find more low resistivity reservoirs. In this paper, the productivity prediction of Chang-2 low resistivity reservoir in the study block is carried out, and the formula is applied to 16 wells in this area which are not involved in the formula calculation.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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