文献类型：会议论文

英文题名：Environment Analysis Based on Logging Data and Methods of Logging Sedimentary from Shale Oil Reservoirs in the Continental Basin

作者：Pu, Xiaoqiang[1];Jiang, Zaixing[2];Zhu, Wenjuan[3];Guo, Baohua[3];Liao, Congyun[1,3]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Guangdong, Peoples R China;[2]China Univ Geosci, Beijing 100083, Peoples R China;[3]Guangdong Prov Key Lab Coastal Ocean Variat & Dis, Guangzhou, Guangdong, Peoples R China

会议论文集：4th International Conference on Energy and Environmental Protection (ICEEP)

会议日期：JUN 02-04, 2015

会议地点：Shenzhen, PEOPLES R CHINA

语种：英文

外文关键词：shale reservoir; total organic carbon; sedimentary environment; well logging

外文摘要：It is important to make a correct stratigraphic division in shale formation for establishment of stratigraphic framework and history recovery of basin development. Information of deposition water depth, useful for formation classification and correlation, can be extracted from total organic carbon (TOC) content profile of depth in shale formation. TOC of shale can be calculated from Logging data of resistivity (RT) and acoustic (AC), since occurrence of TOC could cause value increasing of resistivity and acoustic speed in formation. In this paper, shale reservoirs of Luo67 well provided with data of core analysis are studied in Zhanhua sag. Based on the TOC data of core analysis, as a standard, a formula for TOC contents using logging data is established through improved method of Delta LogR for shale formation in this study area. Furthermore, sedimentary environment of formation in studied depth section is discussed according to the information coming from TOC, mineral contents calculated from log data, and GR Spectrometry log data, respectively. Several periods with different environmental characters were divided from deep to shallow in Luo67 study section: (1) shallow lake environment with dry and warm climate suffering evaporation; (2) relative closed shallow lake with oxidizing water body; (3) increasing water depth lake with redox potential from oxidation to reduction; (4) water depth of lake remaining a relatively high level with fluctuation, warm and humid climate, increasing terrigenous input, and reduced condition; (5) relative open shallow lake with oxidizing water body. Therefore, organic carbon contents calculated from logging data in shale can be used to indicate changes of water depth of deposition process. Moreover, TOC data combined with core analysis data and logging data can be used to analyze sedimentary environment. It has important reference value for analysis of sequence stratigraphy and sedimentary environment in shale formations.