苏码头蓬Ⅲ气藏难动用区块开发

【作者】 付蓉；

【导师】 熊钰； 黄桢；

【作者基本信息】 西南石油大学 ， 石油与天然气工程， 2010， 硕士

【摘要】 苏码头蓬III段储层物性具有中低孔、低渗、高含水饱和度特征,储集空间以孔隙为主,孔隙结构复杂,孔渗性能纵横向变化较大,储层非均质性强。储层裂缝发育较差。因此储层本身的地质条件决定了气井产能低,储量丰度低,储量动用难度高,经济效益差。本文在苏码头蓬III段的构造、断层特征、储层特征等详细的开发地质研究基础上,利用多种方法复算了该区块的地质储量、并进行了储量可采性评价；根据气藏试采效果,通过气井的动态分析、跟踪研究,认识其生产规律、产量递减规律,为储量动用方式提供了较详细的气藏地质和工艺研究基础；在多种支撑剂的性能评价及对比优选、压裂液配方筛选、现场试验及效果分析的基础上,提出针对类似苏码头蓬III段中低孔、低渗、高含水饱和度气藏,宜采用“小规模、低前置液、中低排量、中高砂比、强化返排”的压裂工艺技术来提高储量动用率；采用该技术进行的13口井16井次现场施工表明(压裂施工成功率达100%、有效率81.25%,单井平均增产倍数高达10倍左右)：该技术对低孔、低渗、高含水饱和度的低渗气藏可获得显著的增产效果和较大的经济效益。更多还原

【Abstract】 The nature of Sumatou Peng III Reservoir could be described as low/medium porosity, low permeability and high SW. The reservoir fluid is mainly stored in pore space. T he pore structure is complicated, the pore-permeability performance varies in horizontal direction and with high heterogeneity. Thus the geologic condition of reservoir is the main reason for low productivity, low accessible reserves and poor economic benefit.Based on the geology structure, fault analysis and reservoir properties studies, several methods have been adopted to re-calculate the reserve. The accessible reserve feasibility study has been carried out as well.With well test data, the well performance and decline characteristic has been analyzed through the reservoir dynamic analysis. A detailed development method was generated based on the study.The development method demonstrated that to improve the recovery, Sumatou Peng III Reservoir should apply "small size stimulation, low frac fluid pad, low-mid pump rat e, mid-high sand ratio and aggressive cleanup" which was based on the proppants sele ction, hydraulic fracture fluids design and field trial.13 wells(16 frac operations) stimulated with this development philosophy demonstrated that(100%success execution,81.25%efficiency,10 times increase on-production per well):this technology can improve the production and increase economic benefit in ti ght gas field with low porosity, low permeability, high Sw.更多还原