Method and device for constructing horizontal well trajectory

Abstract

The invention discloses a method and device for constructing a horizontal well trajectory, and relates to the field of oil reservoir engineering. The method for constructing the horizontal well trajectory comprises the steps that a deposition phase band diagram, reservoir lithology and physical property modeling results and a three-dimensional residual oil distribution result are obtained; by using the deposition phase band diagram, the reservoir lithology and physical property modeling results and the three-dimensional residual oil distribution results, the horizontal well trajectory is builtin a transverse-cut river way mode based on a preset rule, wherein a transverse-cut river way is in the direction of a vertical river way and penetrates through an oil reservoir between interlayers.The method and device solve the problems that for a thick reservoir with conspicuous plane and interlayer conflicts, the low-efficiency and inefficient circulation phenomenon is prominent, vertical well digging difficulty is large, and the economic benefit of a conventional horizontal well along the river way is poor.

Description

technical field [0001] The invention relates to the field of reservoir engineering, in particular to a method and device for constructing a horizontal well trajectory. Background technique [0002] Horizontal wells can increase the exposure length of reservoirs and increase the drilling rate, and have irreplaceable advantages in the development of heavy oil, low permeability, marginal, and thin interbedded reservoirs. Horizontal wells at home and abroad are widely used in various reservoirs Examples of success. After long-term practice, for unconsolidated sandstone reservoirs represented by Daqing Sartu Oilfield, horizontal wells were often used on the top of thick oil layers in the past, and the trajectory was designed by following the channel. It is short and there is little room for adjustment in later measures, and the economic benefits are poor, so it is difficult to promote in a large area. Contents of the invention [0003] In view of this, the present invention p...

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Problems solved by technology

[0003] In view of this, the present invention provides a method and device for constructing horizontal well trajectories, so as to solve the problem of inefficient and ineffective circulation in thick oil layers with prominent plane and intralayer contradictions, the difficulty of tapping the potential of vertical wells, and the economic benefits of conventional horizontal wells along the river. bad question

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