井眼截面形状测量方法、装置和终端

方鑫定; 徐剑侠; 杨振涛

方鑫定

南方科技大学

南方科技大学

518055 广东省深圳市南山区西丽学苑大道1088号

南方科技大学

518055 广东省深圳市南山区西丽学苑大道1088号 (广东,深圳,南山区)

南方科技大学

518055 广东省深圳市南山区西丽学苑大道1088号 (广东,深圳,南山区)

CN201710855148.7

2017-09-20

CN107780926B

2020-05-22

2020-05-22

授权

2020-05-22

授权发明

第一

本发明属于测井技术领域，尤其涉及一种井眼截面形状测量方法、装置、终端和计算机可读存储介质，其中，所述方法包括：获取多臂井径仪在同一井筒深处的多个测井数据；所述测井数据包括以多臂井径仪中心为参考点的井壁坐标；根据所述井壁坐标，利用带约束条件的最小二乘法拟合评价函数获取所述井筒深处的井眼中心坐标和井眼半径；所述约束条件为所述井壁坐标到所述井眼中心坐标的距离大于或等于所述井眼半径；保证了所述井壁坐标位于经过所述最小二乘法拟合评价函数拟合得到的圆的圆外或圆上；从而获得真实的井眼截面形状，降低了井径测量的误差，提高了井眼截面形状测量结果的可信度。

The invention belongs to the technical field of well measurement, and particularly relates to wellbore cross section shape measurement method, device, terminal and computer-readable storage medium. The method comprises the following steps: obtaining multiple pieces of well measurement data, at the same depth of a well casing, of a multi-arm well diameter instrument; the well measurement data comprises a well wall coordinate with the center of the multi-arm well diameter instrument as a reference point; according to the well wall coordinates, fitting an evaluation function utilizing a least square method with a boundary condition to obtain a wellbore central coordinate and the radius of the wellbore at the depth of the well casing; wherein the boundary condition is that, the distance between the well wall coordinate and the wellbore central coordinate is greater than or equal to the radius of the wellbore; in this way, it is ensured that the well wall coordinate is located outside or on a circle obtained by means of fitting the evaluation function with the least square method; so that a realistic cross section shape of the wellbore is obtained, the errors of well diameter measurement are reduced, and the credibility of a measurement result of the cross section shape of the wellbore is improved.

E21B47/08

E21B47/08

（+PATENT GRANT）[2020-05-22][CN]

3

3

官建红

深圳中一专利商标事务所

PatSnap

方鑫定,徐剑侠,杨振涛. 井眼截面形状测量方法、装置和终端[P]. 2020-05-22.