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#3137 Make sure azimuth angles are clockwise and 0 to 360.

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This commit is contained in:
Gaute Lindkvist 2018-07-03 09:33:17 +02:00
parent 4112682b6a
commit 0bbe0db394
1 changed files with 16 additions and 6 deletions
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22
ApplicationCode/ReservoirDataModel/RigGeoMechWellLogExtractor.cpp
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@ -112,8 +112,9 @@ void RigGeoMechWellLogExtractor::wellPathAngles(const RigFemResultAddress& resAd
CVF_ASSERT(values);
CVF_ASSERT(resAddr.fieldName == "Azimuth" || resAddr.fieldName == "Inclination");
values->resize(m_intersections.size(), 0.0f);
const double epsilon = 1.0e-3;
const double epsilon = 1.0e-6 * 360;
const cvf::Vec3d trueNorth(0.0, 1.0, 0.0);
const cvf::Vec3d up(0.0, 0.0, 1.0);
for (int64_t intersectionIdx = 0; intersectionIdx < (int64_t)m_intersections.size(); ++intersectionIdx)
{
size_t elmIdx = m_intersectedCellsGlobIdx[intersectionIdx];
@ -125,16 +126,25 @@ void RigGeoMechWellLogExtractor::wellPathAngles(const RigFemResultAddress& resAd
if (resAddr.fieldName == "Azimuth")
{
double azimuth = 0.0;
double azimuth = HUGE_VAL;
// Azimuth is not defined when well path is vertical. We define the azimuth as 0.0 in this case.
// Azimuth is not defined when well path is vertical. We define it as infinite to avoid it showing up in the plot.
if (cvf::Math::valueInRange(inclination, epsilon, 180.0 - epsilon))
{
cvf::Vec3d projectedTangentXY = wellPathTangent;
projectedTangentXY.z() = 0.0;
// Deviation from "True North" (positive y-direction)
azimuth = cvf::Math::toDegrees(std::acos(cvf::Vec3d(0.0, 1.0, 0.0) * projectedTangentXY.getNormalized()));
// Do tangentXY to true north for counter clockwise angles.
double dotProduct = projectedTangentXY * trueNorth;
double crossProduct = (projectedTangentXY ^ trueNorth) * up;
// http://www.glossary.oilfield.slb.com/Terms/a/azimuth.aspx
azimuth = cvf::Math::toDegrees(std::atan2(crossProduct, dotProduct));
if (azimuth < 0.0)
{
// Straight atan2 gives angle from -PI to PI yielding angles from -180 to 180.
// We want angles from 0 to 360, so add 180 degrees.
azimuth = azimuth + 360.0;
}
}
(*values)[intersectionIdx] = azimuth;