大庆石油地质与开发2017，Vol.36Issue(6)：146-153,8.DOI:10.19597/J.ISSN.1000-3754.201612094
致密油藏直井体积压裂压力分析模型
PRESSURE ANALYZING MODEL FOR THE SRV VERTICAL WELL IN TIGHT OIL RESERVOIRS
摘要
Abstract
Strong stresssensitivity is generally presented for the matrix and fracture in tight reservoirs,and meanwhile due to the reservoir compactness,the un-steady crossflow is often characterized for the matrix and fracture,thus the configurations and features of the bottom-hole pressure curves and moreover the interpreted results are influenced.At present,there lacks the bottom-hole pressure analyzing model simultaneously considering the stress sensitivity and un-steady cross flow at home and abroad.Taking the micro-seismic monitored data of the typical SRV vertical wells in the oil reservoir as the references,the physical model was designed for the well flow,the stress sensitivity and un-steady cross flow was considered at the same time,the mathematical model of the bottom hole pressure for the SRV vertical well was established and resolved,thus the log-log characteristics of the bottom hole pressure were obtained.The study achievements show that the bigger the stress sensitivity coefficient is,the greater the pressure derivative slope will be,the weaker the radical flow of the tight oil in the unstimulated areawill be;the smaller the un-steady cross flow coefficient is,the later the crossflow will be,the more serious the concave amplitude of the cross-flow will be,the longer the duration of the crossflow process will be,the weaker the fracture radical flow in the stimulated area will be.Compared with the models without considering the stresssensitivity and pseudo-steady crossflow,the analyzing model of the bottom hole pressure can more accurately determine the stimulated radii and other related reservoir parameters,enhance the interpreted precision of the relative parameters to the SRV of the vertical well in the tight oil reservoir,so the model can be generalized to the parameter inversion and well test interpretation of the tight reservoir.关键词
致密油藏/体积压裂/压力分析模型/应力敏感/数值反演Key words
tight oil reservoir/stimulated reservoir volume (SRV)/pressure analysis model/stress sensitivity/numerical inversion分类
能源科技引用本文复制引用
祝浪涛,廖新维,赵晓亮,陈志明,穆凌雨..致密油藏直井体积压裂压力分析模型[J].大庆石油地质与开发,2017,36(6):146-153,8.基金项目
国家科技重大专项“致密气渗流规律与气藏工程方法”(2016ZX05047-004) （2016ZX05047-004）
国家重点基础研究发展(973计划)项目“致密油高效开发油藏工程理论与方法研究”(2015CB250900). （973计划）
