为了明确水平井钻遇储层的物性差异对非均质油藏水平段内产能动用规律的影响,本文以M断块高孔渗底水油藏为例,通过建立水平井井筒内流动非线性方程,求解了非均质油藏水平段内产量分布及压力分布规律;同时结合Eclipse数值模拟软件多段井...为了明确水平井钻遇储层的物性差异对非均质油藏水平段内产能动用规律的影响,本文以M断块高孔渗底水油藏为例,通过建立水平井井筒内流动非线性方程,求解了非均质油藏水平段内产量分布及压力分布规律;同时结合Eclipse数值模拟软件多段井模块Multi-Segment Well Model监测水平井不同水平位置、不同计算时间的流量、压力等指标。方程求解和数模论证结果印证了本断块水平井存在水平井段生产端产量大、末段产量小的分布特征,水平段内压力从水平井的末端至生产端是逐渐减小的。现场实践表明,分段开采可以有效改善因储层非均质性导致的水平井动用效果差问题,该研究对于同类长水平段非均质储层的开发具有一定的指导意义。展开更多
Faulted gas reservoirs are very common in reality,where some linear leaky faults divide the gas reservoir into several reservoir regions with distinct physical properties.This kind of gas reservoirs is also known as l...Faulted gas reservoirs are very common in reality,where some linear leaky faults divide the gas reservoir into several reservoir regions with distinct physical properties.This kind of gas reservoirs is also known as linear composite(LC)gas reservoirs.Although some analytical/semi-analytical models have been proposed to investigate pressure behaviors of producing wells in LC reservoirs based on the linear composite ideas,almost all of them focus on vertical wells and studies on multiple fractured horizontal wells are rare.After the pressure wave arrives at the leaky fault,pressure behaviors of multiple fractured horizontal wells will be affected by the leaky faults.Understanding the effect of leaky faults on pressure behaviors of multiple fractured horizontal wells is critical to the development design.Therefore,a semi-analytical model of finite-conductivity multiple fractured horizontal(FCMFH)wells in LC gas reservoirs is established based on Laplace-space superposition principle and fracture discrete method.The proposed model is validated against commercial numerical simulator.Type curves are obtained to study pressure characteristics and identify flow regimes.The effects of some parameters on type curves are discussed.The proposed model will have a profound effect on developing analytical/semi-analytical models for other complex well types in LC gas reservoirs.展开更多
文摘为了明确水平井钻遇储层的物性差异对非均质油藏水平段内产能动用规律的影响,本文以M断块高孔渗底水油藏为例,通过建立水平井井筒内流动非线性方程,求解了非均质油藏水平段内产量分布及压力分布规律;同时结合Eclipse数值模拟软件多段井模块Multi-Segment Well Model监测水平井不同水平位置、不同计算时间的流量、压力等指标。方程求解和数模论证结果印证了本断块水平井存在水平井段生产端产量大、末段产量小的分布特征,水平段内压力从水平井的末端至生产端是逐渐减小的。现场实践表明,分段开采可以有效改善因储层非均质性导致的水平井动用效果差问题,该研究对于同类长水平段非均质储层的开发具有一定的指导意义。
基金Project(2017QHZ031)supported by Scientific Research Starting Project of Southwest Petroleum University,ChinaProject(18TD0013)supported by Science and Technology Innovation Team of Education Department of Sichuan for Dynamical System and Its Applications,ChinaProject(2017CXTD02)supported by Youth Science and Technology Innovation Team of Southwest Petroleum University for Nonlinear Systems,China。
文摘Faulted gas reservoirs are very common in reality,where some linear leaky faults divide the gas reservoir into several reservoir regions with distinct physical properties.This kind of gas reservoirs is also known as linear composite(LC)gas reservoirs.Although some analytical/semi-analytical models have been proposed to investigate pressure behaviors of producing wells in LC reservoirs based on the linear composite ideas,almost all of them focus on vertical wells and studies on multiple fractured horizontal wells are rare.After the pressure wave arrives at the leaky fault,pressure behaviors of multiple fractured horizontal wells will be affected by the leaky faults.Understanding the effect of leaky faults on pressure behaviors of multiple fractured horizontal wells is critical to the development design.Therefore,a semi-analytical model of finite-conductivity multiple fractured horizontal(FCMFH)wells in LC gas reservoirs is established based on Laplace-space superposition principle and fracture discrete method.The proposed model is validated against commercial numerical simulator.Type curves are obtained to study pressure characteristics and identify flow regimes.The effects of some parameters on type curves are discussed.The proposed model will have a profound effect on developing analytical/semi-analytical models for other complex well types in LC gas reservoirs.
