Southwest Petroleum University

Xiao Li

Jianchun Guo

Bo Gou

Chi Chen

Chao Liu

Bo Yang

Jichuan Ren

Jie Lai

Mingyong Zeng

Zhuang Liu

Xiangzeng Wang

Shiyan Hao

Ruimin Gao

Li Zhan

Feng Shen

Nianxi Wang

Jinqiao Wu

Jun Ni

The present invention discloses a method for experimentally determining the influence of acid liquor on the Young modulus of compact carbonate rock. The method comprises the following steps: (1), selecting a standard core of compact carbonate rock for use, carrying out a uniaxial compressive strength experiment to establish an empirical relationship between the uniaxial compressive strength and the Young modulus of the compact carbonate rock; (2), selecting a full-diameter core in a target work area for use, carrying out a rock scratching experiment by using a rock scoring instrument, testing the compressive strength of the core, and acquiring the Young modulus of the core before acid treatment; (3), soaking the acid liquor and the core in a high-temperature and high-pressure reactor for a soaking reaction; and (4), carrying out a scratching experiment again on the core soaked with the acid liquor in the original scratching experiment position, testing the compressive strength of the core, acquiring the Young modulus of the core after acid treatment, and determining the influence of the acid liquor on the Young modulus of the compact carbonate rock. The method disclosed by the present invention is reliable in principle, and simple and convenient in operation. The influence of the acid liquor on the Young modulus of the compact carbonate rock under reservoir conditions is authentically evaluated, and the acid fracturing transformation effect of the compact carbonate rock is further improved.

Method for experimentally determining influence of acid liquor on Young's modulus of compact carbonate rock

The invention discloses a testing device and method for evaluating effects of COreaction rate of acid rock plate. The testing device includes an acid fluid conveying unit, a COconveying unit, a mixing tank, a plate holder, a recycling fluid tank, and a vacuum pump. The mixing tank includes an acid fluid inlet, a COinlet, and a miscible fluid outlet. The acid fluid inlet is connected with the acid fluid conveying unit, the COinlet is connected with the COconveying unit, the miscible fluid outlet is connected with the plate holder, the plate holder is connected with the recycling fluid tank, and the recycling fluid tank is connected to the vacuum pump. The COconveying unit includes a COcylinder and a gas booster pump which is connected to the cylinder. The outlet of the pump is connected to the gas inlet of the mixing tank.

Testing method for evaluating the effect of CO2 reaction rate of acid rock plate

The invention discloses a plate holder for simulating flowing of multiphase fluids in fractures, comprising a rectangular box, provided with a fluid inlet and a fluid outlet at the left and right sides respectively, the fluid inlet is connected to a piston at the fluid inlet, the fluid outlet is connected to a piston at the fluid outlet, an internal flow channel of the piston is arranged as a flared guide groove, and the cavity between the pistons is a rock plate cavity; a pair of horizontally-overlapped rectangular rock plates are installed in the rock plate cavity, four sides parallel to the length direction of the rock plate are completely attached and covered with rubber, the outer side of the rubber is covered with steel plate, fastening screws are installed vertically on the four sides of the box that are directly opposite to the steel plate.

Plate holder for simulating flowing of multiphase fluids in fractures and an operating method thereof

The present invention discloses a method for experimentally determining the conductivity distribution of an acid-fractured fracture a carbonate rock oil and gas reservoir, including the following steps: by an acid fracturing simulator FracproPT, simulating and acquiring distribution data of fracture width, fracture height, temperature and acid liquor mass concentration in a hydraulic fracture length direction; selecting fracture width, fracture height and temperature data of total 10 feature points with the acid liquor mass concentrations being from 100% to 10% of the initial mass concentration; converting site acid injection displacement into laboratory acid injection displacement; preparing experimental acid liquor according to the acid liquor mass concentration data of the 10 feature points; and simulating the acid etching process, and experimentally testing the conductivity under the condition of reservoir closed pressure, and drawing a distribution diagram of the acid-etched fracture conductivity in the fracture length direction under the reservoir condition.

Method for experimentally determining conductivity distribution of acid-fractured fracture of carbonate rock oil and gas reservoir

Growing community of inventors

Chengdu, China

Xiao Li