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Optimal drilling trajectory prediction method of lateral well

A trajectory prediction and horizontal well technology, applied in drilling equipment and methods, drilling equipment, directional drilling, etc., can solve the problem that the drilling trajectory of horizontal wells cannot be quantitatively predicted

Pending Publication Date: 2018-08-24
刘敬寿
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Problems solved by technology

[0004] The present invention aims to solve the above problems, and provides a method for predicting the optimal drilling trajectory of a horizontal well, which solves the problem that the drilling trajectory of a horizontal well cannot be quantitatively predicted

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  • Optimal drilling trajectory prediction method of lateral well
  • Optimal drilling trajectory prediction method of lateral well
  • Optimal drilling trajectory prediction method of lateral well

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specific Embodiment approach

[0071]The Ordos Basin belongs to the secondary structural units at the western end of the North China Platform, including six secondary structural units, Weibei Sag, Jinxi Flexure Belt, Yimeng Uplift, Yishan Slope, Tianhuan Depression, and West Margin Thrust Structural Belt. It is the second largest sedimentary basin in my country. During the geological history, the Ordos Basin has experienced six tectonic evolution stages: the basement formation stage (Archean-Early Proterozoic), the concentrated development stage of continental rifts (Middle and Late Proterozoic), and the craton depression and marginal subsidence stage ( Early Paleozoic), the formation stage of craton depressions and collisional margins (Late Paleozoic-Early and Middle Triassic), the development stage of large inland depressions (Late Triassic-Cretaceous), the development stage of fault depressions around basins (Cenozoic generation). The geological structure of the Ordos Basin is gentle, lacks anticlines an...

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Abstract

The invention relates to the technical field of exploration and development of oil and gas fields, in particular to an optimal drilling trajectory prediction method of a lateral well. The method includes the steps of acquiring a rock three-dimensional dynamics parameter field through conversion of dynamic static rock dynamics; determining natural fracture systems and occurrence distribution through core palaeomagnetic orientation, imaging logging and array acoustic logging; conducting present stress field simulation utilizing the rock three-dimensional dynamics parameter field; determining development probability of fractures of different periods utilizing acoustic emission experiments to simulate ancient stress field of different periods; simulating and determining present crustal stressvertical distribution through stress field simulation of well areas; and predicting fracturing fracture spreading directions utilizing crustal stress, fractures and vertical distribution of rock dynamics to establish an equivalent extending vertical zonation model of fracturing fractures. The optimal drilling trajectory prediction method of the lateral well verifies the reliability of fracturing fracture spreading directions by combining the drilling direction of the lateral well and dynamic materials of the lateral well, and realizes direction prediction of fracturing fractures of different blocks and optimal drilling trajectory design of the lateral well.

Description

technical field [0001] The invention relates to the field of exploration and development of oil and gas fields, in particular to a method for predicting the optimal drilling trajectory of a horizontal well. Background technique [0002] As an important component of the reservoir dual-media model, fractures in tight sandstone reservoirs and shale reservoirs play an important role in oil and gas migration and fluid seepage. The development of fractures has a dual effect on the formation or development of reservoirs. On the one hand, compared with matrix pores, fractures have a large conductivity and provide important channels for oil and gas migration and fluid seepage; on the other hand, fractures allow fluid movement. If the trajectory is simplified, oil and gas cannot be accumulated or cause water flooding and water channeling between oil wells. The study of the current in-situ stress field can provide scientific background information for the layout, adjustment and develo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B43/26E21B7/04G06Q50/02
CPCE21B47/00E21B7/046E21B43/26G06Q50/02
Inventor 刘敬寿
Owner 刘敬寿
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