公开(公告)号：US20210003005A1

公开(公告)日：2021-01-07

申请号：US16620657

申请日：2018-09-21

Applicant: University of Science and Technology Beijing

Inventor： Weiyao ZHU ,  Zhiyong SONG ,  Ming YUE ,  Yunfeng LIU ,  Zhen CHEN ,  Dongxu MA ,  Wenchao LIU ,  Qian Qi

IPC: E21B49/02 ,  G01V99/00 ,  G01N3/08

Abstract: A method for identifying a medium structure coupling and a fracture network morphology of a shale gas reservoir includes the following steps. Firstly, performing a fracturing test on shale cores by using a modified Brazilian disc test and categorizing the fracture network morphology. Secondly, performing a shale matrix-fracture structure and stress sensitivity test on the shale cores having different fracture network morphology. After that, determining a stress sensitivity constant of different fracture network morphology according to indoor core data and finally preparing an identification chart of the fracture network morphology based on an indoor core stress sensitivity text combined with a production practice. The identification chart can be applied to an actual fracturing well, and the fracture network morphology is directly identified by a real-time effective stress and a normalized flow.

公开(公告)号：US20200224522A1

公开(公告)日：2020-07-16

申请号：US16833806

申请日：2020-03-30

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY, BEIJING

Inventor： Weiyao ZHU ,  Kun HUANG ,  Zhen CHEN ,  MING YUE ,  ZHIYONG SONG ,  HUA LI ,  BAICHUAN WANG ,  DEBIN KONG

IPC: E21B43/30 ,  E21B43/16 ,  E21B41/00

Abstract: This disclosure provides a method of optimizing well spacing for shale gas development. It belongs to the technical field of hydrocarbon reservoir exploration and development. The method comprises: firstly verifying block area based on the explored geological structure; analyzing the connection situation of a shale reservoir, identifying the minimum developing area units; calculating the recoverable reserves of the units, confirming the candidate units; drilling representative shale cores and analyzing related physical properties; calculating seepage field and pressure field using unified multi-field, multi-flow-regime, and multi-scale mathematical models; calculating the effective recoverable area of each well; and arranging wells based on the rule that the interference among wells is not larger than 10%. Considering the fluid-solid coupling effects, this method can define appropriately well spacing for shale gas exploration and enhance effectively the output of shale gas.

公开(公告)号：US20190330980A1

公开(公告)日：2019-10-31

申请号：US16475138

申请日：2018-09-06

Applicant: University of Science and Technology Beijing

Inventor： Weiyao ZHU ,  Ming YUE ,  Dongxu MA ,  Ziheng ZHOU ,  Hongyan HAN ,  Zhiyong SONG ,  Wenchao LIU

IPC: E21B49/00 ,  G01N15/08

Abstract: A device and a method for evaluating a gas-water two-phase flow fracture conductivity of a fractured shale. The device includes a seepage system, an injection system, a data collecting and processing system and a three-axis shale core holder, wherein the seepage system is subjected to two stages including a water injection stage and a gas flooding stage. When using the device, firstly the initial permeability and initial mass of the shale sample are determined; the water influx test is performed by injecting water to the shale sample until flow rate of the water discharged from the shale core is stable, then the water injection is ended. After the drying device is installed, the shale sample is subjected to gas flooding, and the aqueous fracturing fluid discharged by the gas flooding is collected until the flow meter determines that the gas volume is stable, and then the gas flooding is ended.