Shale oil horizontal well deployment method and device

A technology for horizontal wells and shale oil, which is applied in the field of shale oil horizontal well deployment methods and devices, and can solve the problems of deploying shale oil horizontal wells in fault zones

Active Publication Date: 2019-11-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]At present, the design method of shale oil horizontal wells is still in the exploratory stage, and the existing technology is still unable to realize the quantitative deployment of shale oil horizontal wells in fault zones

Method used

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  • Shale oil horizontal well deployment method and device
  • Shale oil horizontal well deployment method and device
  • Shale oil horizontal well deployment method and device

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Experimental program
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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, it is a schematic flow chart of a shale oil horizontal well deployment method provided by an embodiment of the present invention. figure 1 Visible, this method comprises the following steps:

[0033] Step S102: Obtain the structural contour data and sweet spot distribution data of the target area.

[0034] Here, the target area is an area within which horizontal wells are to be deployed. For this embodiment, the target area may be an area predicted to contain shale oil. In addition, structural contours are also called structural contours, and a structural contour map is a map that uses contour lines on a certain structural surface to represent its underground structure. This kind of map is similar to the topographic map showing the undulation of the ground, so its compilation principle is also similar to the topographic map. The structural contour map has the following characteristics:

[0035] ① The structural contour line essentially repr...

Embodiment 2

[0085] In order to better understand the above-mentioned shale oil horizontal well deployment method, this embodiment uses an application example to illustrate. Wherein, the shale oil horizontal well deployment method shown in this example mainly includes the following three steps:

[0086] 1) Use the structural contour map and fracture distribution map to exclude unfavorable engineering fracturing areas.

[0087] ① Determine fault distribution and fault throw. There are three faults in the research area, namely F1 fault, F2 fault and F3 fault. First, calculate the maximum fault throw (δ d-max ) and average fault distance (δ d-ave ): F1 Fault: δ d-max is 482m, δ d-ave 402m; F2 fault: δ d-max is 215m, δ d-ave 137m; F3 fault: δ d-max is 83m, δ d-ave It is 52m.

[0088] ② Determine the scope of fracture influence. F1 fault, F2 fault and F3 fault δ d-max and δ d-ave They are respectively substituted into the calculation formula IA=0.2073δd+140.16 of ...

Embodiment 3

[0105] The embodiment of the present invention also provides a shale oil horizontal well deployment device, such as Figure 5 As shown, the device includes a sequentially connected data acquisition module 51, a horizontal well favorable drilling area and a horizontal section distribution area determination module 52, a horizontal well direction determination module 53 and a horizontal section parameter determination module 54, wherein the functions of each module are as follows:

[0106] A data acquisition module 51, configured to acquire structural contour data and sweet spot distribution data of the target area;

[0107] The horizontal well favorable drilling area and the horizontal section distribution area determination module 52 are used to determine the horizontal well favorable drilling area in the target area and the horizontal section distribution area of ​​the horizontal well to be deployed according to the structural contour data and the sweet spot distributio...

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Abstract

The invention provides a shale oil horizontal well deployment method and device. The method includes the following steps that structure contour data and dessert distribution data of a target area areobtained; according to the structure contour data and the dessert distribution data, a favorable drilling exploration area of a horizontal well and a horizontal section distribution area of a to-be-deployed horizontal well in a target area are determined; one secant is set in the horizontal section distribution area, in the range of the favorable drilling exploration area of the horizontal well, the average value of the included angles between the secant and structure contour normals is calculated, and the maximum intersection distance between the intersections of the secant and structure contours and the intersection of the secant and a boundary line of the dessert distribution data is calculated; according to the average value of the included angle and the maximum intersection distance,the direction of the to-be-deployed horizontal well is determined; according to the direction of the to-be-deployed horizontal well, an entrance window point, a control point and a drilling finishingpoint of a horizontal section of the to-be-deployed horizontal well are determined. The method can achieve quantitative deployment of the shale oil horizontal well in a fracture zone.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a shale oil horizontal well deployment method and device. Background technique [0002] The target layer of the existing horizontal well design is mainly for sandstone reservoirs or tight sandstone reservoirs, and the spatial distribution of sandstone or tight sandstone is mainly affected by the supply capacity of terrigenous clastics. Based on the sand body combination mode and sand body thickness, the equivalent map of sand layer thickness is drawn, and the well pattern is designed according to the plane distribution characteristics of sand body and oil layer thickness. In contrast, shale oil is distributed in the middle of the lake basin and is less affected by terrigenous clastics. It has the characteristics of stable plane distribution and overall oil content. In the process of horizontal well design, the top-bottom structure contour map of the sweet spot is ma...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B49/00E21B43/30
CPCE21B47/00E21B49/00E21B43/305
Inventor 陈长伟周立宏李晓良韩国猛赵敏马建英朱桂娟
Owner PETROCHINA CO LTD
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