A well layout method for gas storage

Abstract

The invention belongs to the technical field of gas reservoir engineering, and in particular relates to a method for arranging wells in a gas storage. The present invention first divides the construction area of ​​the gas storage into two areas by stratum coefficient, and then calculates the relationship between the working gas volume in different areas and the number of gas production wells in the area. On this basis, according to the principle of maximizing the working gas volume, each Reasonable number of gas production wells in the area. Finally, according to the calculated number of gas production wells in each area, the wells are arranged in a uniform way. The working gas volume of the gas storage can be effectively increased by this well arrangement method.

Description

Technical field

[0001] The present invention belongs to the field of gas reservoir engineering, and specific relates to a gas storage fabric method. Background technique

[0002] The gas storage usually has a short gas supply time and a large working capacity. The domestic gas storage single-cycle gas intake time is generally around 2-30, but the working capacity during the gas deposit accounts for 20-40% of the gas library geological reserves, and the gas supply rate reached around 120% after the conversion. Therefore, the gas storage wanted to take a lot of gases in such a short period of time, the choice of the fabric mode is very important.

[0003] The gas storage fabric is very different from the conventional gas field development. Under the same investment conditions, the pursuit of gas field development fabrics is the maximization of gas field, while the gas storage fabric is pursued. A maximization of working gas in a gas accommodation period (3-4 months), currently uses...

Examples

Embodiment 1

[0106] like figure 1 One kind of gas storage method shown well spacing, comprising the steps of:

[0107] Step 1: Send the area of ​​the library area

[0108] According to the land layer coefficient, the library area is divided into two regions;

[0109] Step 2: Calculate the relationship between the gas consumption and the number of gas reception wells in different regions

[0110] According to the two regions divided by the step, the relationship between different regional working charge and gas intake well in the region is obtained by the following procedure.

[0111] a. Calculate the original geological reserves of different regions;

[0112] b. Calculate different regional formation pressure P and regional accumulated gas content Q relationship;

[0113] c. Determining the gas storage area of ​​the gas storage area under different stratum pressure under different formation pressure;

[0114] d. According to the calculation results of reasonable daily gastrum capacity of C in ...

Embodiment 2

[0196] A gas storage fabric method,

[0197] Step 1, according to the size of the land layer coefficient, the library area is divided into two regions.

[0198] The main layer coefficient of the gas storage library is 20 md · m, according to the size of the land layer coefficient, the library area is divided into two regions of A and B, where the A region formation coefficient is between 8-20md · m, the B region formation The coefficient is between 0-8 md · m.

[0199] Step II. Calculate the relationship between the working gas volume and the area of ​​gas in different regions

[0200] a. Calculate the original geological reserves of different regions

[0201] Depending on the gas content, the average effective thickness, the average porosity, the average original gas saturation and the original formation of pressure data are used, and the original geological reserves of different regions are used, and the original geological reserves of different regions are calculated. The speci...

Technical field

[0001] The present invention belongs to the field of gas reservoir engineering, and specific relates to a gas storage fabric method. Background technique

[0002] The gas storage usually has a short gas supply time and a large working capacity. The domestic gas storage single-cycle gas intake time is generally around 2-30, but the working capacity during the gas deposit accounts for 20-40% of the gas library geological reserves, and the gas supply rate reached around 120% after the conversion. Therefore, the gas storage wanted to take a lot of gases in such a short period of time, the choice of the fabric mode is very important.

[0003] The gas storage fabric is very different from the conventional gas field development. Under the same investment conditions, the pursuit of gas field development fabrics is the maximization of gas field, while the gas storage fabric is pursued. A maximization of working gas in a gas accommodation period (3-4 months), currently uses...

Examples

Embodiment 1

[0106] like figure 1 One kind of gas storage method shown well spacing, comprising the steps of:

[0107] Step 1: Send the area of ​​the library area

[0108] According to the land layer coefficient, the library area is divided into two regions;

[0109] Step 2: Calculate the relationship between the gas consumption and the number of gas reception wells in different regions

[0110] According to the two regions divided by the step, the relationship between different regional working charge and gas intake well in the region is obtained by the following procedure.

[0111] a. Calculate the original geological reserves of different regions;

[0112] b. Calculate different regional formation pressure P and regional accumulated gas content Q relationship;

[0113] c. Determining the gas storage area of ​​the gas storage area under different stratum pressure under different formation pressure;

[0114] d. According to the calculation results of reasonable daily gastrum capacity of C in ...

Embodiment 2

[0196] A gas storage fabric method,

[0197] Step 1, according to the size of the land layer coefficient, the library area is divided into two regions.

[0198] The main layer coefficient of the gas storage library is 20 md · m, according to the size of the land layer coefficient, the library area is divided into two regions of A and B, where the A region formation coefficient is between 8-20md · m, the B region formation The coefficient is between 0-8 md · m.

[0199] Step II. Calculate the relationship between the working gas volume and the area of ​​gas in different regions

[0200] a. Calculate the original geological reserves of different regions

[0201] Depending on the gas content, the average effective thickness, the average porosity, the average original gas saturation and the original formation of pressure data are used, and the original geological reserves of different regions are used, and the original geological reserves of different regions are calculated. The speci...

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