摘要
埕南断裂带东邻孤北洼陷,南为渤南洼陷,北以埕南大断层为界与呈子口凸起相接,油气成藏条件优越。该带Ng103层油藏为低饱和深层超稠油油藏,由于油稠、埋深大等不利因素一直未投入开发。随着水平井热采技术的进步,优选该带埕911-平1块实施部署开发,取得了一定的效果。分析埕911-平1块生产效果,发现制约该块整体高效开发的问题。一是该块含油饱和度低,油藏认识不清导致该块出现产能差异。二是超稠油油藏井轨迹对开发效果的影响。针对该带潜力及存在的问题,重新开展系统解剖,重点开展了三个方面的针对性研究。首先针对油层底部含油饱和度好的特点,精细落实油层的底面微构造特征;其次针对该油层与普通油层差异,重新建立该层电性-物性模板,确定当电阻>8.6Ω·m,声波>341μs/m时,含油饱和度>40%,为油层。同时结合试采,按照标准确定高效动用厚度;第三利用建立的油藏体模型,结合已开发区块生产特征,利用物理模型优化水平井轨迹位置。在此研究基础上,对西部埕南12-平11块实施部署开发,实现了埕南12-平11块的高效动用,同时也为下一步继续扩大该带低饱和深层超稠油油藏的开发潜力。
The Chengnan fault zone is adjacent to the Gubei sag in the east, the Bonan sag in the south,and the Chengzikou bulge in the north with the Chengnan fault as the boundary, which has excellent hydrocarbon accumulation conditions. The Ng103 layer reservoir is a low-saturation deep super-heavy oil reservoir, which has not been put into development due to unfavorable factors such as thick oil and large burial depth. With the advancement of thermal recovery technology in horizontal wells, it is preferred that the block C911-P1 be deployed and developed, and achieved certain results. Analyze the production effect of the C911-P1 block, and find the problems restricting the overall efficient development of the block: 1. The block has low oil saturation and unclear understanding of the reservoir, which results in a difference in production capacity of the block. 2. The influence of well trajectory on development effect of ultra-heavy oil reservoirs.Aiming at the potential and existing problems in the zone, the system was reanalyzed and focused research was carried out in three areas. First, the characteristics of good oil saturation at the bottom of the reservoir were finely implemented, and the microstructural characteristics of the bottom of the reservoir were implemented. Differences in common oil layers, re-establish the electricalphysical template of this layer, and determine that When the resistance is greater than 8.6 and the acoustic wave is greater than 341, the oil saturation is greater than 40%,it is an oil layer. At the same time,combined with trial production, the high-efficiency thickness is determined according to the standard.Third, the established reservoir body model and the production characteristics of the developed block are used to optimize the horizontal well trajectory position using the physical model. On the basis of this research, the deployment and development of Block CN12-P11 in the west has been realized, and the efficient utilization of Block CN12-P11 has been realized. At the same time, the development potential of low-saturation deep super-heavy oil reservoirs in this zone has been expanded for the next step.
作者
隋明阳
SUI Mingyang(Research Institute of Geophysical Prospecting,Shengli Oilfield Branch,China Petroleum&Chemical Corpora-tion,Dongying 257022,China)
出处
《河南科技》
2022年第1期77-82,共6页
Henan Science and Technology
基金
中石化股份公司科研攻关项目“多资料联合解释及油藏建模一体化技术研究”(P21038-4)。
关键词
埕南断裂带
低饱和
构造解析
储层预测
勘探开发实践
chengnan fault zone
low saturation
construction analysis
reservoir prediction
exploration and development practice
