公开(公告)号：US20230028649A1

公开(公告)日：2023-01-26

申请号：US17934750

申请日：2022-09-23

Applicant: PETROCHINA COMPANY LIMITED

Inventor： Jiahuan HE ,  Lurui DANG ,  Keming ZHOU ,  Cheng LEI ,  Mei HUANG ,  Jintao ZHANG ,  Bo KONG

IPC: G01V3/18 ,  G01V3/38

Abstract: The present disclosure provides a device and methods for determining the original stratum direction of a core. The device includes a confining pressure pump, a resistance meter, and a core holder composed of upper and lower portions. The present disclosure further provides three methods for determining the original stratum direction of the core. The three methods respectively use the device to measure resistance values at different positions of the core, and compare a test result with an imaging result of resistivity imaging logging data to determine the rock direction of the core in a stratum.

公开(公告)号：US20190271621A1

公开(公告)日：2019-09-05

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.