Fireflooding oil-extracting method for exploiting super heavy oil reservoir with bottom water

A technology for ultra-heavy oil and ultra-heavy oil, applied in the field of fire flooding oil production, can solve the problems of no safe and reliable fire-flooding technology for ultra-heavy oil, unstable combustion front fire line propulsion, and longitudinal heterogeneity. Achieve the effect of high oil recovery rate, accelerated flow rate and enhanced oil recovery

Inactive Publication Date: 2017-05-10
PETROCHINA CO LTD
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Problems solved by technology

[0008] In order to solve the problem that the ultra-heavy oil reservoir with bottom water is difficult to exploit, the present invention provides a fire flooding recovery method for exploiting the ultra-heavy oil reservoir with bottom water. The oil flooding recovery method solves the problem that there is no safe and reliable fire flooding technology for extra heavy oil by applying the fire flooding development method to the ultra-heavy oil reservoir with bottom water. The problem of unstable propulsion and serious longitudinal heterogeneity at the edge of fire

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  • Fireflooding oil-extracting method for exploiting super heavy oil reservoir with bottom water
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  • Fireflooding oil-extracting method for exploiting super heavy oil reservoir with bottom water

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[0028] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0029] A fire flooding oil recovery method for exploiting bottom water ultra-heavy oil reservoirs, comprising the following steps:

[0030] Step 1, screening reservoirs;

[0031] Select ultra-heavy oil reservoirs containing bottom water layer 1;

[0032] Step 2. Deploy the well pattern;

[0033] Two horizontal wells are deployed, and the horizontal sections of the two horizontal wells are located in the oil layer 2 of the ultra-heavy oil reservoir, such as figure 1 with figure 2 shown; or, deploy two rows of vertical wells, the working sections of the two rows of vertical wells are located in the oil layer 2 of the ultra-heavy oil reservoir, as image 3 shown;

[0034] Step 3, steam stim...

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Abstract

The invention provides a fireflooding oil-extracting method for exploiting a super heavy oil reservoir with bottom water. The method comprises the following steps of oil reservoir screening, well pattern arranging, steam stimulation, crude oil fireflooding and crude oil extracting. According to the fireflooding oil-extracting method for exploiting the super heavy oil reservoir with the bottom water, fireflooding oil extracting is conducted by adoption of different well pattern combination modes and different perforation modes, a bottom water layer is provided with flowing channels for the three phases of oil, gas and water in the fireflooding process, gas overlapping can be effectively controlled, fire line advancing is stable, and the purposes of uniform longitudinal producing, high oil flushing efficiency, high recovery efficiency, low production cost and good economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a fire flooding oil recovery method for exploiting bottom water ultra-heavy oil reservoirs. Background technique [0002] Fire flooding technology is a method of enhancing oil recovery. It injects air into the oil layer, uses part of the heavy components of crude oil in the oil layer as fuel, and continuously burns to generate heat to drive out the crude oil in the oil layer. Tests have proved that the residual oil saturation in the burned area in the oil layer is almost zero, and the recovery rate can reach 85% to 90%. [0003] The fire flooding process is basically a process in which the combustion front slowly advances from the injection well to one or several production wells. The process begins with the injection of air into an injection well arranged in the center, surrounded by a group of production wells. After the gas permeability is established, the com...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/243
CPCE21B43/243
Inventor 席长丰钱永娟张霞林施小荣吴键关文龙蒋有伟王红庄李秀峦
Owner PETROCHINA CO LTD
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