石油钻探技术
石油鑽探技術
석유찬탐기술
PETROLEUM DRILLING TECHNIQUES
2015年
2期
8-13
,共6页
定向钻井%井眼轨迹%井身质量%邻井防碰%法面扫描
定嚮鑽井%井眼軌跡%井身質量%鄰井防踫%法麵掃描
정향찬정%정안궤적%정신질량%린정방팽%법면소묘
directional drilling%well trajectory%wellbore quality%adjacent well anti-collision%normal-plane scanning
法面扫描是分析实钻轨迹偏离程度、邻井防碰、定向井中靶等井间关系的重要方法。然而，传统方法存在2个主要缺陷：一是采用比较井段两端点是否位于法面异侧来判别法面与比较井是否存在交点的方法不具有普遍适用性，可能会遗漏掉邻井防碰的危险点；二是用迭代法来求解法面与比较井的交点，需要进行大量的轨迹插值与比较等方面的计算，计算量大、收敛性差。为此，基于井眼轨迹的空间圆弧模型，发展完善了法面与比较井是否相交的判别方法，并研究提出了求解其交点的解析法。这些方法不需要对比较井进行插值计算，仅需要比较井的设计轨道节点或实钻轨迹测点数据就能得到准确的计算结果，大大减小了计算量。应用实例验证了研究结果的科学性和适用性。
法麵掃描是分析實鑽軌跡偏離程度、鄰井防踫、定嚮井中靶等井間關繫的重要方法。然而，傳統方法存在2箇主要缺陷：一是採用比較井段兩耑點是否位于法麵異側來判彆法麵與比較井是否存在交點的方法不具有普遍適用性，可能會遺漏掉鄰井防踫的危險點；二是用迭代法來求解法麵與比較井的交點，需要進行大量的軌跡插值與比較等方麵的計算，計算量大、收斂性差。為此，基于井眼軌跡的空間圓弧模型，髮展完善瞭法麵與比較井是否相交的判彆方法，併研究提齣瞭求解其交點的解析法。這些方法不需要對比較井進行插值計算，僅需要比較井的設計軌道節點或實鑽軌跡測點數據就能得到準確的計算結果，大大減小瞭計算量。應用實例驗證瞭研究結果的科學性和適用性。
법면소묘시분석실찬궤적편리정도、린정방팽、정향정중파등정간관계적중요방법。연이，전통방법존재2개주요결함：일시채용비교정단량단점시부위우법면이측래판별법면여비교정시부존재교점적방법불구유보편괄용성，가능회유루도린정방팽적위험점；이시용질대법래구해법면여비교정적교점，수요진행대량적궤적삽치여비교등방면적계산，계산량대、수렴성차。위차，기우정안궤적적공간원호모형，발전완선료법면여비교정시부상교적판별방법，병연구제출료구해기교점적해석법。저사방법불수요대비교정진행삽치계산，부수요비교정적설계궤도절점혹실찬궤적측점수거취능득도준학적계산결과，대대감소료계산량。응용실례험증료연구결과적과학성화괄용성。
Normal plane scanning is an important method in interwell relationship analyses such as drilling trajectory deviation ,adjacent well anti‐collision and directional well targeting .However ,the con‐ventional method has two major defects :(1) it can determine whether normal plane has an intersection with comparison well by identifying whether both ends of comparison well section are on the different sides of the normal plane ,which may omit danger points of adjacent well anti‐collisions ;(2) the iteration method can be used for solving the intersection between normal plane and comparison well but needs complicated calculations in the track interpolation ,resulting that the convergence is usually poor .T herefore ,a method is developed based on the spatial arc model of well tracking to determine whether the normal plane is intersec‐ted with the comparison .An analytical method is proposed to solve the intersection .It does not need inter‐polation for the comparison well but can obtain accurate calculation results by using a design track node or drilling track measuring point data of the comparison well ,thus greatly reducing calculations .Its applicabil‐ities have been verified by application examples .
