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张重阳,熊健,梁利喜,等. KS地区砾岩地层岩石力学特性试验研究[J]. 科学技术与工程, 2020, 20(27): 11038-11044.
Zhang Chongyang,Xiong Jian,Liang Lixi,et al.Experimental Study of Rock Mechanical Properties of Conglomerate Formation of KS Area[J].Science Technology and Engineering,2020,20(27):11038-11044.
KS地区砾岩地层岩石力学特性试验研究
Experimental Study of Rock Mechanical Properties of Conglomerate Formation of KS Area
投稿时间:2019-09-11  修订日期:2020-09-04
DOI:
中文关键词:  砾岩  岩石力学实验  基础物性  力学特性  
英文关键词:conglomerate  rock mechanics experiment  basic physical properties  mechanical property
基金项目:砂砾岩致密油岩石力学特征描述与建模
              
作者单位
张重阳 西南石油大学 油气藏地质及开发工程国家重点实验室
熊健 西南石油大学 油气藏地质及开发工程国家重点实验室
梁利喜 西南石油大学 油气藏地质及开发工程国家重点实验室
刘向君 西南石油大学 油气藏地质及开发工程国家重点实验室
张旭 西南石油大学 油气藏地质及开发工程国家重点实验室
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中文摘要:
      以KS地区的砾岩研究对象,通过XRD衍射、岩石力学实验研究了该地区砾岩地层的基础物性、力学特征。研究结果表明:砾岩砾石颗粒主要是泥晶灰岩和灰质云岩组成,基质主要由碳酸盐岩、黏土矿物、石英和长石类矿物组成;砾石和基质强度差异较大,砾石的的压入硬度分布在569.39 MPa~1379.33 MPa,平均值为973.46 MPa,是砾岩基质硬度的2-3倍;砾岩地层的岩石力学参数变化范围大,砾岩未浸泡钻井液条件下,单轴抗压强度分布在59.74 MPa~75.5MPa,而浸泡现场钻进液后砾岩抗压强度下降较明显,下降幅度约为42.7%;砾岩脆性较强,峰值应变小于2%,在浸泡现场钻井液后脆性更为明显,峰值应变小于1%,砾岩破坏形式以劈裂为主,绕砾是裂缝扩展的主要形态。
英文摘要:
      The basic physical properties and mechanical characteristics of the conglomerate Formation in KS area were studied by XRD analysis and rock mechanics experiment. The results show that the conglomerate gravel particles are mainly composed of micritic limestone and lime-cloud, and the matrix is mainly consist of carbonate rocks, clay minerals, quartz and feldspar minerals. There is a great difference in strength between gravel and matrix, The compressive hardness of gravel is distributed between 569.39MPa and 1379.33 MPa with an average value of 973.46 MPa, which is 2-3 times of the hardness of conglomerate matrix. The rock mechanics parameters of the conglomerate formation vary widely. The compressive strength of the conglomerate is distributed in the range of 59.74 MPa ~ 75.5 MPa under the condition that the drilling fluid is not soaked in the conglomerate. However, the compressive strength of the conglomerate decreases significantly after soaking the drilling fluid, with a decrease range of about 42.7%. The brittle condition of conglomerate is relatively strong, with the peak strain less than 2%. After soaking the drilling fluid, the brittleness is more obvious, and the peak strain is less than 1%. Fracture is the main failure form of conglomerate, and the fracture propagation mainly transfer from going?through gravel to bypassing grave.
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