Method for combination exploitation of multiple longitudinal small fault blocks by multiple-target directional well

Abstract

The invention provides a method for combination exploitation of multiple longitudinal small fault blocks by a multiple-target directional well. The method includes: through accurate geological research and structural interpretation, clearly determining geologic features and structural features of a research area; analyzing planar and longitudinal remaining oil distribution laws of a fault block area layer by layer and block by block, performing potential analysis and well pattern design layer by layer and block by block, and computing controlled reserves and increasing recoverable reserves; adopting a 'three-optimization' design method to design target locations; utilizing seismic section to carry out wellbore trajectory optimization, analyzing reasonability of target optimization scheme design, and performing trajectory optimization design; tracking drilling progress on site, grasping drilling dynamic conditions, and adjusting and controlling a smart well trajectory in time. By the aid of the method for combination exploitation of the multiple longitudinal small fault blocks by the multiple-target directional well, the problem of poor economic benefit of drilling in single longitudinal remaining oil enriched areas of the complicated small fault blocks is solved, and the purpose of benefit exploitation of the complicated small fault blocks by 'series' of the single longitudinal remaining oil enriched areas is achieved.

Description

technical field [0001] The invention relates to the field of greatly increasing the recovery rate of water flooding in the extra-high water-cut period of complex fault-block reservoirs, and in particular to a method for utilizing multi-target directional wells to combine vertically multiple small fault blocks for development. Background technique [0002] Fault-block oil reservoirs have produced geological reserves of 1.53 billion tons (accounting for 35.4% of Shengli Oilfield); annual oil production of 8.04 million tons (accounting for 29.5% of Shengli Oilfield), is an important type of oil reservoir in the oil field, and currently has a high water cut (91.2%). With less investment, the imbalance between storage and production is prominent. How to greatly increase the recovery rate of mature areas and maintain the scale of remaining recoverable reserves has become the main problem facing the development of fault-block reservoirs. There are various types of fault-block rese...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method that can solve the problem of poor economic benefits of drilling in a single remaining oil-enriched area in the vertical direction of complex small fault blocks, and realize the purpose of beneficial development of complex small fault blocks using multi-target directional wells to combine multiple vertical small fault blocks developed method

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