低渗透油藏压裂井产能规律研究

发布时间：2018-10-05 17:46

【摘要】：胜利油田樊162区块属于低孔、特低渗油藏,储层物性差,具有较强的压力敏感性,导致流体在地层中的流动阻力增大,油井日产量极低。此外,该区块地层天然能量不足,注水开发时注水井吸水能力很差,即使注水压力很高也往往难以见到注水效果,对油田的稳定生产非常不利。目前,水力压裂开采技术是开发特低渗透油藏常用的有效增产措施。但油井压裂、特别是水平井压裂产能规律认识不深给后期的配产及单井设计等带来了一系列问题,因此研究低渗透油藏压裂后油井的产能规律,有利于更好的认识和分析压裂的效果。本文首先基于实际区块的压裂水平井数据,建立了典型的油藏数值模拟模型,研究了油藏地质参数、压裂裂缝参数和压敏效应等对压裂水平井产能的影响规律。在此基础上,提出了一种新的产能预测公式,可预测不同参数组合的压裂水平井在不同生产时间的日产油量。另外,基于樊162区块投产初期的整体压裂、五点注采井网的开发模式,建立了整体压裂井组的概念模型,研究了油井裂缝参数、水井裂缝参数和井底压力等参数对压裂井产能的影响规律,并对油井裂缝和水井裂缝参数进行优化。研究结果表明,整体压裂、五点注采井网的油水井裂缝参数的最优组合为油井的裂缝半缝长150m、油井的裂缝导流能力30μm2·cm、水井的裂缝半缝长100m、水井的裂缝导流能力40μm2·cm。应用到实际模型中,结果显示四口油井的产油量均得到了一定程度的提高,同时含水率有所下降,对现场具有一定的指导作用。
[Abstract]:Fan 162 block in Shengli Oilfield belongs to low porosity and very low permeability reservoir with poor physical property and strong pressure sensitivity, which results in the increase of fluid flow resistance in the formation and the extremely low daily production of oil well. In addition, the formation of this block is short of natural energy, the water absorption capacity of water injection wells is very poor, even if the water injection pressure is very high, it is often difficult to see the water injection effect, which is very unfavorable to the stable production of the oilfield. At present, hydraulic fracturing technology is commonly used to develop low-permeability reservoir production measures. But oil well fracturing, especially horizontal well fracturing, has brought a series of problems to the later production distribution and single well design, so the productivity law of oil wells after fracturing in low permeability reservoir is studied. It is helpful to understand and analyze the effect of fracturing. In this paper, a typical reservoir numerical simulation model is established based on the fracturing horizontal well data of the actual block, and the effects of reservoir geological parameters, fracturing fracture parameters and pressure sensitivity effects on the productivity of fractured horizontal wells are studied. On this basis, a new productivity prediction formula is proposed, which can predict the daily oil production of fracturing horizontal wells with different combinations of parameters at different production times. In addition, based on the development model of integral fracturing and five-point injection-production pattern at the initial stage of production in Fan 162 block, the conceptual model of integral fracturing well group is established, and the fracture parameters of oil well are studied. The effects of well fracture parameters and bottom hole pressure on the productivity of fracturing wells are studied. The fracture and well fracture parameters are optimized. The results show that the optimal combination of fracture parameters of five-point injection and production wells for integral fracturing is as follows: the fracture half fracture length of the well is 150m, the fracture diversion capacity of the well is 30 渭 m2 cm, well, the fracture half fracture length is 100m, and the fracture conductivity of the well is 40 渭 m2 cm.. The results show that the oil production of the four wells has been improved to a certain extent, and the water cut has been decreased, which has a certain guiding role to the field.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE328;TE348

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