SU133832A1 - The method of industrial exploration gas field - Google Patents

Description

There are known methods of exploration of gas fields, similar to the methods of exploration of oil fields.

The proposed method of industrial exploration of a gas field is based on the use of the physical properties of gas, which are very different from the properties of oil, as well as on the significant difference in the operating conditions of gas and oil fields.

It makes it possible to significantly reduce the amount of exploration drilled compared to the conventional exploration methods borrowed from petroleum practice.

Gas, unlike oil, is removed from a reservoir without the use of marginal or contour-flow flooding and is suitable for production wells from remote areas without a large pressure loss. The working rate of gas wells, ceteris paribus, is greater than the rate of oil wells. Zakonurnurna water does not have time to restore the gas pressure in the process of its extraction from the reservoir, and in the first stage of the development of the reservoir the movement of water into it is negligible.

In the described method, it is proposed to carry out exploration of a gas reservoir without detailed study of the marginal part, with a sharp reduction in the volume of drilling operations for contouring, limiting it, as a rule, to 1-2 wells.

Exploration wells, within the field, are laid in an amount not exceeding that required for operation. One of the first exploratory wells was laid in the well-known part of the field to determine the water head, with item no. 133832-2 -

the following determination of the height position of the gas / water contact by calculating the ratio of the head of the circuit water and the pressure in the gas pool. The search for the oil rim under the gas pool starts from the place of the lowest head of the formation water. In the absence of an oil rim in this part of the reservoir, it is not searched for in other parts. At the same time, the study of water pressure in prospective horizons is carried out both in regional terms and in individual fields, hell.

Based on the trial operation of the very first exploration wells that gave gas, industrial reserves are calculated, using the well-known relationship between the amount of gas and its pressure in the reservoir. Trial operation of the wells is established, in the absence of a gas or gas pipeline near the consumer, by transferring gas from the reservoir to the reservoir and only as a last resort by discharging gas into the air.

Subject invention

Claims (3)

1. Industrial gas exploration method by drilling exploration wells to determine its size and estimating reserves, characterized in that, in order to reduce the volume of exploratory drilling, one of the first exploration wells is used to determine the elevation of the gas-water contact according to the ratio of the pressure of the reservoir water and the reservoir pressure of the gas, the search for oil rims under  The gas deposits of the field begin at the site of the lowest head of the reservoir water and the first exploratory wells that gave gas are put into trial operation to estimate the size of the field and its reserves using the pressure drop method. 2. Industrial exploration method according to claim 1, characterized in that exploration wells within the gas field are laid in an amount not exceeding the number of wells required for the operation of the field. 3. The method of industrial intelligence on PP. 1 and 2, characterized in that the pilot operation is carried out by supplying gas to the nearest consumer or to a neighboring gas pipeline, or by flowing from a formation into a formation.