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A monitoring method for oil well staged fracturing effect

A technology of staged fracturing and effect monitoring, applied in the field of oil and gas field exploration and development, can solve the problems of inability to quantitatively describe the production capacity of oil wells, the effect is not obvious, and the measure technology and the measure effect do not correspond.

Inactive Publication Date: 2016-09-14
PETROLEUM ENG TECH RES INST OF JIANGHAN OILFIELD BRANCH OF
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Problems solved by technology

The method described in this patent is that the tracer is injected into the water well, and the oil well is produced. It can only qualitatively detect whether different layers of the oil and water wells are connected, and cannot quantitatively describe the productivity of the oil well.
[0004] With the development of Jianghan Oilfield, large-scale construction including multi-stage fracturing of horizontal wells, and multi-layer construction often have the situation that the measure technology does not correspond to the measure effect, that is, the process is successful, but the effect is not obvious

Method used

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  • A monitoring method for oil well staged fracturing effect

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Embodiment

[0026] Preparation of the monitoring agent: Physically mix two different solid powdery tracer substances holmium and ytterbium metal complexes with oil-soluble resin materials, and then granulate them after mixing evenly, with a particle size of 20-40 mesh. Two monitoring agents were prepared and named JC-1 and JC-2 respectively. The monitoring materials are two kinds of tracer substances, both of which are used in an amount of 4kg. The oil-soluble material uses the same phenolic resin material, and the dosage is 40kg.

[0027] The well was fractured in two stages. In the first stage of fracturing, the monitoring agent JC-1 and sand were pumped into the fracturing layer at the beginning of sand addition. At the beginning of sand addition in the second stage of fracturing, the monitoring agent JC-2 is pumped into the fracturing layer together with the sand. After the fracturing is completed, samples are taken for monitoring every 4-6 hours during the blowout stage, and sample...

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Abstract

The invention discloses a method for monitoring the staged fracturing effect of an oil well, comprising: 1) preparation of a monitoring agent: mixing a monitoring material and an oil-soluble material to make 20-60 mesh particles, wherein the content of the monitoring material is less than 10 wt %; 2) During staged fracturing construction, the monitoring agent and proppant are pumped in at each stage; 3) After the fracturing construction is completed, the crude oil flows through the fractures, gradually dissolving the oil-soluble materials in the monitoring agent, and the monitoring agent in the monitoring agent The material will gradually disperse into the oil phase and water phase in the crude oil; 4) Sampling the output crude oil to determine the content of the monitoring agent; combined with the distribution coefficient of the monitoring agent in oil and water, calculate and determine the output of each stage. Oil situation and contribution rate to production, so as to determine each fluid production profile and completion efficiency. The invention can effectively perform quantitative analysis on the output of each stage after staged fracturing, generate the production logging curve of each stage, and determine the well completion efficiency.

Description

technical field [0001] The invention relates to the field of exploration and development of oil and gas fields, and more particularly relates to a method for monitoring the effect of staged fracturing of oil wells. Background technique [0002] In order to obtain higher oil production capacity, oil well fracturing technology continues to develop, among which multi-stage fracturing technology is the focus of development in recent years. However, the segmental effect evaluation after multi-stage fracturing has become a problem that needs to be solved. At present, there is a fracturing fracture monitoring technology "oil well fracturing seismic surface-in-well fracture monitoring method, 201010151905.0", which uses the propagation of elastic wave field in the formation medium characteristics, the microseismic waves are received by the monitoring substations arranged around the wellhead, and a series of equations will be formed according to the arrival time difference of the mic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00E21B43/267E21B49/08
Inventor 李亚林张凡黄亚杰邓明坚田敬元岳泉陆昌盛唐芳高婷常启新
Owner PETROLEUM ENG TECH RES INST OF JIANGHAN OILFIELD BRANCH OF
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