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Obtaining method and device of gas assisted dosage in steam assisted gravity drainage process

A gas-assisted and gravity-assisted technology, which is applied in the fields of fluid production, earthwork drilling and production, and special data processing applications, can solve the problem that the numerical simulation model of the reservoir takes a lot of time, and it is difficult for the numerical simulation technology of the reservoir to meet the requirements of rapid oil field development. Completion of program design and other issues

Inactive Publication Date: 2015-03-04
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

The establishment and adjustment of the reservoir numerical simulation model requires a lot of time; and the history matching work and the adjustment of related parameters after the model is established will consume a lot of time; on the basis of the above work, the optimization design of the relevant process parameters can be carried out
Therefore, it is difficult for reservoir numerical simulation technology to meet the requirements of fast completion of scheme design in the oil field, and it cannot realize the purpose of real-time tracking of production process and adjustment of injection-production scheme

Method used

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  • Obtaining method and device of gas assisted dosage in steam assisted gravity drainage process

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Embodiment

[0198] 1. Reservoir overview

[0199] Guantao Oil Reservoir in Block Du 84 of Liaohe Oilfield is a side water, top water and bottom water reservoir surrounded by water, with a buried depth of 530-649m and an average effective thickness of 112m. It is extremely thick massive ultra-heavy oil Tibetan. The average porosity is 36.2%, and the average permeability is 5.54μm 2 . The average density of ground crude oil at 20°C is 1.007g / cm 3 , The viscosity of ground degassed crude oil at 50°C is 231910mPa·s, and the content of colloid and asphaltenes is 52.9%. SAGD test area with double horizontal wells in the north of Block Du 84, with an oil-bearing area of ​​0.05km 2 , the geological reserves are 49.4×10 4 t. The original formation temperature is 30°C, and the geothermal gradient is 3.8°C / 100m; the original formation pressure is 6.02MPa, and the pressure coefficient is 0.98. The oil layer is separated from the top water by a bitumen shell without mudstone interlayer. There ...

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Abstract

The invention relates to an obtaining method and a device of a gas assisted dosage in a steam assisted gravity drainage process. The method comprises the steps of: determining the oil pool thickness occupied by non-condensed gas in a steam cavity, the rock volume occupied by free non-condensed gas at the top of the steam cavity and the rock volume occupied by the free non-condensed gas and steam in the steam cavity; obtaining the amount of substances of gas dissolved in single-side cumulative oil production, the amount of substances of gas dissolved in residual oil in a single-side gas layer, the amount of substances of gas dissolved in residual oil in a single-side gas and steam cavity and the amount of substances of free gas in the single-side gas layer; and obtaining the volume of gas required to be injected under the standard condition by using the amount of substances of gas dissolved in the single-side cumulative oil production, the amount of substances of gas dissolved in residual oil in the single-side gas layer, the amount of substances of gas dissolved in residual oil in the single-side gas and steam cavity and the amount of substances of free gas in the single-side gas layer.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a method and a device for obtaining auxiliary gas consumption in the steam-assisted gravity oil drainage process. Background technique [0002] (1) SAGD [0003] Steam Assisted Gravity Drainage (SAGD) is a novel production method that combines horizontal wells and steam injection to recover heavy oil. The process was first proposed by Professor R.M.Butler in Canada, and a field test was carried out in Alberta, Canada, which achieved success and started large-scale industrial application. The Steam Assisted Gravity Drainage (SAGD) process uses steam as the heating medium and relies on gravity to recover heavy oil. The SAGD process generally involves drilling a horizontal production well close to the bottom layer of the oil layer, and continuously injecting steam through a second horizontal well or a series of vertical wells parallel above the well to form a steam ...

Claims

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Application Information

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IPC IPC(8): E21B43/24G06F19/00
CPCE21B43/2406G16Z99/00
Inventor 庞占喜刘慧卿张红玲何晓明
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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