[1]何小东,马俊修,刘刚,等.玛湖油田砾岩储集层岩石力学分析及缝网评价[J].新疆石油地质,2019,(06):701.[doi:10.7657/XJPG20190610]
 HE Xiaodong,MA Junxiu,LIU Gang,et al.Analysis of Rock Mechanics and Assessments of Hydraulic Fracture Network in Conglomerate Reservoirs of Mahu Oilfield[J].Xinjiang Petroleum Geology,2019,(06):701.[doi:10.7657/XJPG20190610]
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玛湖油田砾岩储集层岩石力学分析及缝网评价()
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《新疆石油地质》[ISSN:1001-3873/CN:65-1107/TE]

卷:
期数:
2019年06期
页码:
701
栏目:
出版日期:
2019-12-01

文章信息/Info

Title:
Analysis of Rock Mechanics and Assessments of Hydraulic Fracture Network in Conglomerate Reservoirs of Mahu Oilfield
文章编号:
1001-3873(2019)06-0701-07
作者:
何小东1马俊修1刘刚2石善志1游俊2吴俊涛3
(1. 中国石油 新疆油田分公司 工程技术研究院,新疆 克拉玛依 834000;2. 北京阳光杰科科技股份有限公司,北京 100192;3. 中国石油大学(北京) 石油工程学院,北京 102249)
Author(s):
HE Xiaodong1 MA Junxiu1 LIU Gang2 SHI Shanzhi1 YOU Jun2 WU Juntao3
(1.Research Institute of Engineering Technology, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China; 2.Beijing Sunshine GEO-Tech Co. Ltd, Beijing 100192, China; 3.School of Petroleum Engineering, China University of Petroleum, Beijing 102249, China)
关键词:
玛湖油田百口泉组砾岩储集层岩石力学地应力缝网评价
Keywords:
Mahu oilfield Baikouquan formation conglomerate reservoir rock mechanics in-situ stress fracture network evaluation
分类号:
TE112.23
DOI:
10.7657/XJPG20190610
文献标志码:
A
摘要:
砾岩储集层具有致密、胶结性差和非均质性强的特点,仅依靠地球物理测井分析或单一的力学测试,不能满足储集层裂缝几何形态分析要求。为评价砾岩储集层压裂缝网形成的能力,提出采用多种方法组合测试砾岩岩石力学参数。以准噶尔盆地西北缘玛湖油田玛15井百口泉组砾岩储集层为例,系统分析了砾岩储集层的弹性、压缩性、拉张性、延脆性和地应力,并对缝网形成能力进行了评价。研究结果表明,储集层动静态弹性模量具有较好的相关性,但动静态泊松比相关性较差,测试Biot系数为0.43~0.60,属中等偏致密岩性;研究区现今主应力偏于挤压走滑应力机制,砾石胶结程度低,致使砾岩抗压、抗张、抗剪强度相对较低,在外部载荷下易发生剪切、穿砾或绕砾破坏,压裂时以形成平面缝为主,局部砾岩层容易伴生复杂缝。
Abstract:
Conglomerate reservoirs are characterized by tight rocks, poor cementation and strong heterogeneity, which make it difficult to analyze the complex geometry of the fractures in conglomerate reservoirs only by using geophysical well logging data or single mechanical testing method. In order to evaluate the forming capacity of hydraulic fracture network in conglomerate reservoirs, a combination of various testing methods is proposed to test the mechanical parameters of conglomerate. Taking the conglomerate reservoir of Baikouquan formation in the Well Ma-15 of the Mahu oilfield in the northwestern margin of Junggar basin as a case, the paper systematically analyzes the elasticity, compressibility, tensile property, brittleness and in-situ stress of the conglomerate reservoir and evaluates forming capacity of hydraulic fracture network. The results show that the dynamic and static elastic modulus of the reservoir are well correlated with each other, but the correlation of dynamic and static Poisson ratio is poor. The tested Biot coefficient ranges from 0.43 to 0.60, which indicates that the rock is typical of moderate-to-tight lithology. The in-situ stress in the study area is biased towards compressive strike-slip stress, and the degree of gravel cementation is low, resulting in relatively low compressive, tensile, and shear strength of the conglomerate and damages such as shear fracturing or gravel-penetrating or gravel-bypassing are easy to occur under the external loads. Planar fracture is the main form during fracturing and complex fractures form in local conglomerate formation

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更新日期/Last Update: 2019-11-25