US 11,989,790 B2
Drilling activity recommendation system and method
Tao Shen, Beijing (CN)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Appl. No. 17/755,091
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Oct. 28, 2019, PCT No. PCT/CN2019/113675
§ 371(c)(1), (2) Date Apr. 21, 2022,
PCT Pub. No. WO2021/081706, PCT Pub. Date May 6, 2021.
Prior Publication US 2022/0358604 A1, Nov. 10, 2022
Int. Cl. G06Q 50/00 (2024.01); E21B 41/00 (2006.01); G06Q 10/0637 (2023.01); G06Q 50/02 (2012.01); E21B 7/04 (2006.01); E21B 43/00 (2006.01); G06Q 10/0631 (2023.01)
CPC G06Q 50/02 (2013.01) [E21B 41/00 (2013.01); G06Q 10/0637 (2013.01); E21B 7/04 (2013.01); E21B 43/00 (2013.01); G06Q 10/06312 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for planning a well, comprising:
receiving an initial drill plan for drilling a target well, the initial drill plan including a set of drilling activities including a first drilling activity and a consecutive second drilling activity;
obtaining one or more offset well drilling activity logs generated based on drilling offset wells;
determining, based on the one or more offset well drilling activity logs, a conditional probability of occurrence of one or more drilling activities between the first drilling activity and the second drilling activity;
automatically generating a modified drill plan for drilling the target well by adding the one or more drilling activities to the initial drill plan between the first drilling activity and the second drilling activity, wherein the adding the one or more drilling activities is based on the conditional probability of the occurrence of the one or more drilling activities between the first drilling activity and the second drilling activity; and
drilling the target well, by an automated well drilling system, based on the modified drill plan, wherein the drilling the target well includes:
performing the first drilling activity;
performing the one or more drilling activities after performing the first drilling activity; and
performing the second drilling activity after performing the one or more drilling activities,
wherein automatically generating the modified drill plan comprises:
constructing an offset well drilling run statistical tree based on the one or more offset well drilling activity logs, wherein the offset well drilling run statistical tree comprises probabilities for activities in sequences of drilling activities, and wherein constructing the offset well drilling statistical tree comprises partitioning the one or more offset well drilling activity logs into fragments, and defining nodes in the tree based on the fragments, wherein the nodes each represent an individual activity in the individual fragments and an order in which the nodes appear in the individual fragments, and the nodes are arranged in a parent-child relationship based on the fragments;
selecting a first sequence of activities that ends with the first drilling activity;
selecting the second drilling activity from the initial drill plan;
determining one or more first paths in the tree from a node representing the first drilling activity in the first sequence of activities to a node representing the second drilling activity; and
selecting a first path from the one or more first paths in the tree based at least in part on a conditional probability of the first path.