公开(公告)号：US11175422B2

公开(公告)日：2021-11-16

申请号：US16023226

申请日：2018-06-29

Applicant: PetroChina Company Limited

Inventor： Yongqiang Qu ,  Jianguo Pan ,  Lu Yin ,  Guodong Wang ,  Duonian Xu ,  Tuanyu Teng ,  Bin Wang ,  Jianhua Qu ,  Dezi Li ,  Linjun Huang ,  Yongping Ma ,  Xuezhen Chen

IPC: G01V1/30 ,  E21B49/00 ,  G01V1/28

Abstract: Identifying a low permeable conglomerate diagenetic trap can be implemented according to a method that comprises: determining a first relation curve between a depth and a critical physical property of a known diagenetic trap in a target work area, and a second relation curve between a reservoir physical property of the known diagenetic trap and a designated seismic attribute; determining a third relation curve between the depth and the critical physical property in the target work area and the designated seismic attribute according to the first relation curve and the second relation curve; and performing a diagenetic trap identification of the target work area according to the third relation curve. Identification accuracy of a low permeable conglomerate diagenetic trap can thereby be improved.

公开(公告)号：US10928282B2

公开(公告)日：2021-02-23

申请号：US16079791

申请日：2017-10-31

Applicant: PetroChina Company Limited

Inventor： Youzhi Zheng ,  Bo Kong ,  Jie Li ,  Huiyun Ma ,  Yu Sang ,  Tao Yang ,  Minghua Xie ,  Libin Jiao ,  Fuyun Wang ,  Hongwei Xia ,  Jiang Yu ,  Qiyan Tan ,  Congjing Liu ,  Ji Chen ,  Qiang Fu ,  Xiaoli Zhao ,  Fenglin Guo ,  Yong Wu ,  Yiguo He ,  Bin Wang ,  Xiaojiao Wang

IPC: G01N3/08 ,  G01N3/02 ,  G01N33/38

Abstract: The invention provides a method and device for measuring the elasticity of hardened cement for cementing of oil-gas wells. The measurement method comprises: determining the loading and unloading rates of the hardened cement; determining the maximum loading on the hardened cement; determining the experimental temperature and the experimental pressure of the hardened cement; establishing a stress-strain curve for the hardened cement; and describing the elasticity of the hardened cement with the degree of strain recovery of the hardened cement in different cycles, and describing the mechanic integrity of the hardened cement with the degree of damage to the hardened cement in different cycles. The invention further provides a device for measuring the elasticity of hardened cement for cementing of oil-gas wells. The measurement method and device of the present invention provide a universal comparing platform for research on hardened cement modification as well as examination of domestic and foreign special cement slurry systems, which is of great significance in evaluation of well hole integrity and well life.