Published November 2021, Pg. 26-29

Section: Oil and gas field development and exploitation

UOT: 622.276

DOI: 10.37474/0365-8554/2021-11-26-29

Effectiveness of the well drainage area by changing horizontal well section

J.M. Eyvazov - “Oil-Gas Scientific Research Project” Institute

Currently, horizontal well technology is intensively applied in the oil industry. One of the main reasons for this is that the horizontal wells cover wider drainage zone than vertical ones, and daily oil and gas extraction with them is even higher. The paper basically reviews how the drainage zone has been transformed into the oil saturated area by changing the effective length of the horizontal well. The effect of the length change of that section has been specified by the total oil and gas production. Moreover, the paper analyzes how different horizontal wells are operated in different watercut degrees and tubing head pressure. Horizontal wells require less pressure drop than vertical ones and reduce the likelihood of such problems as water and gas coning, salinity and sand production as well.

References:

1. Borisov Ju.P. Oil production using horizontal and multiple deviation wells. Moscow: Nedra, 1964. Translated
by J. Strauss. S.D. Joshi (ed.). Bartlesville, OK: Phillips Petroleum Co., the R & D Library Translation 1984.

2. SPE 39557. Effect of drainage area and producing rate on horizontal well oil recovery in bottom water drive reservoirs.

3. SPE 69431. Drainage area of horizontal wells with pressure drop in the horizontal section.

4. SPE 64436. A method to estimate the drainage area of a horizontal well.