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Method for detecting and determining fracturing fracture height by using propping agent

A technology of fracture height and proppant, which is applied in the directions of measurement, earthwork drilling, and fluid extraction to achieve the effect of high measurement sensitivity and no radioactive pollution.

Active Publication Date: 2015-10-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

However, it needs two measurements, and it is greatly affected by changes in wellbore fluid and formation fluid saturation before and after fracturing.

Method used

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  • Method for detecting and determining fracturing fracture height by using propping agent
  • Method for detecting and determining fracturing fracture height by using propping agent
  • Method for detecting and determining fracturing fracture height by using propping agent

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Embodiment Construction

[0022] combined with Figures 1 to 6 The specific embodiment of the present invention is described further:

[0023] A method for determining the height of a fracturing fracture by means of proppant detection, the method comprising injecting a proppant equipped with a material with a high capture cross-section through the fracturing fracture of the formation after hydraulic fracturing, and the proppant is made of bauxite as a raw material, It is formed by powder granulation and firing; the proppant is equipped with a high-capture cross-section material, and its main composition is Gd 2 o 3 , where Gd 2 o 3 The percentage to the total amount of proppant is 0.6%-0.8%.

[0024] The pulsed neutron logging tool is used to measure the mixed gamma spectrum of the formation, and the gamma spectrum is processed to obtain the capture gamma counts of the high capture section elements in the measured well section, and then determine the position of the proppant and the height of the f...

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Abstract

The invention discloses a method for detecting and determining fracturing fracture height by using a propping agent. A high capture cross-section material Gd2O3 is added in the propping agent. By using action of pulsed neutrons and the propping agent, Gd capture gamma count is obtained, and fracturing fracture height is determined. After hydrofracture of a stratum, the propping agent containing the high capture cross-section material is injected through stratum fracturing fractures. A pulsed neutron logging instrument is used to measure stratum mixed gamma spectrum. The gamma spectrum is processed to obtain capture gamma count of the high capture cross-section material of a measured well section, so as to determine positions of the propping agent and fracture height. Compared with an existing fracture height determining technology, the method is advantaged by single measurement, high measuring sensitivity, and no radioactive pollution.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas exploration and development, in particular to a method for determining the height of fracturing fractures by means of proppant detection. Background technique [0002] As a production stimulation technology, hydraulic fracturing is widely used in the development of unconventional oil and gas reservoirs such as oil and gas, especially shale oil and gas; it mainly uses hydraulic pressure to fracture the rock layer, and injects proppant to change the seepage capacity of the reservoir , thereby releasing oil or natural gas. Accurate evaluation of proppant position and fracture height near wellbore is of great value for evaluation and optimization of stimulation measures. [0003] At present, the nuclear logging evaluation methods for near-wellbore fracturing fractures mainly include radioactive tracer measurement and non-radioactive tracer measurement. Radioactive measurement technology main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B43/267
Inventor 张锋刘军涛张泉滢王新光
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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