| 摘要: |
| 基于岩石破裂准则,建立造缝期古地应力和现今地应力与裂缝参数之间的关系。通过构造解析确定古今地应力的性质和方向及古应力的大小,运用ANSYS反复调试出现今应力的大小,将裂缝参数计算模型代入古今地应力场的数值模拟结果中,模拟计算准噶尔盆地乌夏地区二叠系火山岩碎屑岩混杂地层裂缝的开度、密度、孔隙度和渗透率。结果表明:风城组裂缝最为发育,分布也最为广泛,在乌夏地区各位置均有发育;佳木河组裂缝比较发育,分布广泛,在乌尔禾地区、风城地区、夏子街地区均有发育,呈条带状。岩心统计资料验证了模拟计算结果的可靠性。 |
| 关键词: 乌夏断裂带 地应力 裂缝孔隙度 有限元分析 |
| DOI：10.3969/j.issn.1673-5005.2010.04.004 |
| 分类号::TE 112.222 |
| 文献标识码:A |
| 基金项目:中国石油天然气股份公司重点攻关项目(B060103) |
|
| Fracture prediction of Permian volcanic clastic rock formation in Wuxia fault belt |
|
WANG Jun1, DAI Jun sheng1, FENG Jian wei1, LI Ming2, PAN Yao li2
|
|
(1.College of Geo Resources and Information in China University of Petroleum, Dongying 257061, China;2.Research Institute of Petroleum Exploration & Development, Liaohe Oilfield, Panjin 124010, China)
|
| Abstract: |
| On the basis of rock failure criteria, functions between the paleo stress and present stress of fracture formed period and the fracture parameters were established. The property, direction of the paleo and present stress and paleo stress strength were estimated by structural analysis, and the present stress strength was calculated repeatedly by ANSYS. The fracture intensity, density, porosity and permeability of volcanic clastic rock formation in Wuxia fault belt in Junggar Basin were calculated through introducing the fracture parameter model into the results of paleo and present stress field numerical simulation. The results show that the fractures in Fengcheng group are developed and extensive distribution in Wuxia area. The fractures in JiaMuhe group are relatively developed and distributed in Wuerhe, Fengchen and Xiazijie regions with ribbon pattern. The validity of this simulation is testified by rock core statistics. |
| Key words: Wuxia fault belt earth stress fracture porosity finite element analysis |
