Southwest Petroleum University

Zhuang Liu

Jianchun Guo

Yong Ren

Bo Gou

Shan Ren

Xiao Li

Qianli Lu

Mingyong Zeng

Le He

Songgen He

Li Zhan

Ji Zeng

Shouyi Wang

A method for determining sand pumping parameters based on width distribution of fracture, including: acquire basic parameters of a target reservoir, simulate a propagation of the fracture, and obtain a propagation pattern and width distribution of the fracture; determine a maximum proppant particle size for entering the fracture at all width levels according to statistical results of the width distribution of the fracture; determine a multi-size combination of proppants according to a mapping table for particle size vs mesh of proppants, and determine an initial ratio of the proppant with each particle size; conduct a numerical simulation of proppant transportation in the fracture to determine a retention ratio of the proppants with each particle size; correct the initial ratio of the proppants with each particle size; calculate an amount of the proppants with each particle size according to the final ratio and the sand pumping intensity and fracturing interval length.

Method for determining sand pumping parameters based on width distribution of fracture

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

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Chengdu, China

Zhuang Liu