摘要
珠江口盆地发现的PY30-1气田其规模储量在300亿m3以上。依据岩心、薄片、扫描电镜、X衍射等资料,详细研究该气田PY30-1-3井储集层特征及成岩作用,按照最新碎屑岩成岩阶段划分标准,该区主力气层SB13.8层处于开启性弱碱型水(pH值为7.53)循环环境,胶结作用不强烈,成岩作用较弱,处于早成岩B期;主力气层MFS18.5层处于中成岩A期,属于相对封闭性弱酸型水(pH值为6.41)循环环境,温度的增加催化了溶蚀作用的进程,为次生孔隙带的发育提供了条件。据此建立了陆相石英砂岩类储集层的成岩模式。
The PY30-1 gas field, found in the east of South China Sea, has 30 billion cubic meters reserves. Based on the data of core, slice, SEM, XRD, the reservoir characteristics and diagenesis of well PY30-1-3, located in this gas field, are studied, According to the latest classified criterion on diagenetic stage of clastic reservoirs, layer SB13. 8, one of the two main producing layers, consists in feeble alkal formation water which is unsealed and belongs to stage B in early diagenesis with weak cementation and feeble diagenesis. Layer pay zone MFS18. 5 consists in feeble acid formation water which is closed relatively and belongs to stage A in middle diagenesis. The augment of temperature accelerates the process of erosion, which provides sufficient and indispensable conditions for deuterogenous pore zones, The diagenetic pattern of continental reservoirs of quartzite is established.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2005年第5期51-55,共5页
Petroleum Exploration and Development
基金
中国海洋石油有限公司科技工程项目(Z2003SLSZ-YX005)
