Method for calculating stratigraphic dip through lateral drilling curvature radius
A technology of formation inclination and curvature radius, which is applied in earth-moving drilling, wellbore/well components, seismic signal processing, etc., can solve problems such as inability to accurately reflect formation inclination, and achieve the effect of easy data acquisition and concise steps.
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Embodiment 1
[0031] A method for calculating the dip angle of a formation by the radius of curvature of a sidetracking well, comprising: projecting at least three boreholes of a directional well onto the same section, processing data with the well deviation according to the principle of three points being in a circle, and calculating three drilled encounter points ground dip angle.
[0032] Described method specifically comprises the steps:
[0033] a. Collect well deviation data and formation layering data of a single well;
[0034] b. Calculate the well deviation data and stratum layer data through the wellbore trajectory to obtain the parameters of each drilling point with the wellhead position as the coordinate origin;
[0035] c. Reasonably determine the co-circular profile of the three points and calculate the vertical depth difference, displacement difference and difference ratio of each drilling point;
[0036] d. Calculate the formation dip angle of the drilled point profile by ...
Embodiment 2
[0045] The present invention is mainly for inclined formations, a directional well has 3 boreholes (or more) (attached figure 1 ), according to the principle of determining a circle at 3 points on the plane, projecting 3 boreholes onto a profile at a certain azimuth is enough to determine a circle (attached figure 2 , attached image 3 ), using the well deviation processing data to calculate the formation dip angles of the three drilled points. According to theoretical derivation and mathematical calculation, the formation dip angles of the top or bottom of the front eye, side eye 1, and side eye 2 are obtained.
[0046] Method of the present invention is specifically as follows:
[0047] 1. Collect the well deviation data and stratigraphic stratification data of the front hole, side hole 1, side hole 2....
[0048] 2. Through the calculation of wellbore trajectory, parameters such as vertical depth, horizontal displacement and displacement azimuth of each drilling point a...
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