Feasibility Study of 3000m Horizontal Section of Jiaoye 2-5HF Horizontal Extended-Reach Well in Fuling Shale Gas, China

2018 ◽  
Author(s):  
Xin Li ◽  
Deli Gao ◽  
Degao Hu ◽  
Youheng Zheng ◽  
Rugang Liao
Keyword(s):  
Feasibility Study ◽  
Shale Gas ◽  
Horizontal Section ◽  
Extended Reach Well

Drilling Dynamics, Mechanical Specific Energy Data Help Drill Record Extended-Reach Well

2021 ◽  
Vol 73 (05) ◽  
pp. 59-60
Author(s):  
Chris Carpenter
Keyword(s):  
Specific Energy ◽  
Response Times ◽  
Oil Field ◽  
Abu Dhabi ◽  
Horizontal Section ◽  
Horizontal Drilling ◽  
Actual Weight ◽  
Mechanical Specific Energy ◽  
Weight On Bit ◽  
Extended Reach Well

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 203335, “Using MSE and Downhole Drilling Dynamics in Achieving a Record Extended-Reach Well Offshore Abu Dhabi,” by Nashat Abbas and Jamal Al Nokhatha, ADNOC, and Luis Salgado, Halliburton, et al., prepared for the 2020 Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, held virtually 9–12 November. The paper has not been peer reviewed. Complex extended-reach-drilling (ERD) wells often present challenges with regard to geological aspects of data requirement and transmittal, reactive geosteering response times, and accuracy of well placement. Such scenarios may require innovative approaches in Middle East carbonate reservoirs. The objective of the complete paper is to illustrate that, by assessing the details of reservoir geology and key operational markers relevant for best practices, drilling approaches can be customized for each reservoir or scenario. Reservoir Background and Geology The planned reservoir section is a single horizontal of approximately 25,000-ft lateral length at a spacing of 250 m from adjacent injectors. The well was drilled from an artificial island. Field A, a shallow-water oil field, is the second-largest offshore field and the fourth-largest field in the world. Horizontal drilling was introduced in 1989, and an extensive drilling campaign has been implemented since then using steerable drilling technologies. This study is concerned only with wells drilled to develop Reservoir B in Field A, which contributes to the main part of initial oil in place and production. The thick limestone reservoir is subdivided into six porous layers, labeled from shallow to deep as A, B, C, D, E, and F. Each porous layer is separated by thin, low-porosity stylolites. The reservoir sublayer B, consisting of approximately 18-ft-thick calcareous limestones, was selected as the target zone for the 25,420-ft horizontal section. ERD, constructed on artificial islands, began on 2014 with a measured depth (MD)/true vertical depth (TVD) ratio approaching 2.2:1 or 2.4:1. A recent ERD well, Well A, was drilled at the beginning of 2020 with a MD/TVD ratio of 5:1. This value is a clear indication of progressively increasing challenges since the start of the project. Mechanical specific energy (MSE) has long been used to evaluate and enhance the rate of penetration (ROP); however, its use as an optimization tool in ERD wells has not been equally significant. This may have been mostly because of historical use of surface-measured parameters, which do not necessarily indicate the energy required to destroy the rock, particularly in ERD wells. Using optimization tools as part of the bottomhole assembly (BHA) downhole close to the bit provides actual weight-on-bit (WOB) and torque-on-bit (TOB) applied to the drilling bit to destroy the rock and, thus, results in more-representative MSE measurements to optimize drilling parameters and ROP in ERD wells.

Achieving Improved Drilling Performance with Hole Cleaning Technology in Horizontal Shale Gas Wells in Sichuan Basin of China

2021 ◽  
Author(s):  
Guodong Ji ◽  
Haige Wang ◽  
Hongchun Huang ◽  
Meng Cui ◽  
Feixue Yulong ◽  
...  
Keyword(s):  
Shale Gas ◽  
Sichuan Basin ◽  
Horizontal Wells ◽  
Drill String ◽  
Operating Parameters ◽  
Optimal Operating ◽  
Horizontal Section ◽  
Drill Cuttings ◽  
Well Completion ◽  
Cuttings Bed

Abstract The horizontal section length of shale gas horizontal wells in Sichuan Basin in the south-west of China generally exceeds 2000m. Cuttings are apt to accumulate and form cuttings beds along such long and curve horizontal sections due to low cuttings carrying capacity, which often results in excessive torque and drag or even stuck pipes during drilling process. According to the statistics dada inthe period of Jan. - Oct. 2019, more than 25 stuck pipe incidents and 15 rotary steering tools loss in borehole were reported due to inefficient cuttings transportation in the long horizontal wells in Sichuan Basin. This paper studies the cuttings transportation and cuttings bed formation in horizontal wells. A prediction model for the distribution of cuttings bed was established. A monitoring and analysis software for the cuttings bed and cuttings cleaner with V-shaped spiral blades that is used to agitate the cuttings bed wasdeveloped. The software calculates the distribution and thickness of the cuttings bed according to the well trajectory, wellbore structure, drilling fluid characteristics, etc., and provides the optimal operating parameters for the removal of the cuttings bed by the rotating and reciprocating drill string. Then, the drill cuttings remover in the drill string moves to the predicted position of the drill cuttings, scrapes the drill cuttings and creates a swirling flow during the pipe rotation. The combined application of software and makeup remover can effectively solve the issue of borehole cleaning in long horizontal wells. One of the field applications was carried out in the well Ning 209H12, a shale gas horizontal well in Sichuan Basin. The well experienced excessive torque and drag issue during the tripping of drill string of long horizontal section. Thesoftware ran based on oil well data, and it determines the placement and thickness of cuttings beds in the well and calculates the optimal operating parameters for a flow rate of about 32L/s and a speed of 100rpm to remove them. By rotatingand reciprocating the drill string with recommended operating parameters along the cuttings bed interval, the removers helped cleaning the cuttings bed efficiently and significant amount of cuttings was observed at vibration screen. After cleaning the cuttings bed interval, the trip smoothly ran to the bottom without any excessive torque and drag, and then continues to drill in cooperation with the removers to the total depth. During the well completion, there was no problem with the operation of electrical logging and production casing. This cuttings removal technology has been used in other shale gas formations and tight gas formations where horizontal wells are widely used.

scholarly journals Development Evaluation and Optimization of Deep Shale Gas Reservoir with Horizontal Wells Based on Production Data

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Wuguang Li ◽  
Hong Yue ◽  
Yongpeng Sun ◽  
Yu Guo ◽  
Tianpeng Wu ◽  
...  
Keyword(s):  
Shale Gas ◽  
Production System ◽  
Target Position ◽  
Horizontal Wells ◽  
Gas Production ◽  
Well Performance ◽  
Gas Reservoir ◽  
Horizontal Section ◽  
Technical Problems ◽  
Shale Gas Reservoir

The implementation of horizontal wells is a key to economic development of the deep shale gas reservoir. In order to optimize the key parameters for drilling, stimulation, and the production system, the development effect of a horizontal well in deep shale gas formations was investigated from various aspects in this study. The drilling, fracturing, and production performances of this well were analyzed combining with the geological characteristics. The main technical problems and key factors that restrict the gas well performance and estimated ultimate recovery (EUR) were clarified. Through the integrated study of geology and engineering, the optimization strategies for increasing gas production and EUR are provided. The Z2 area, where the Z2-H1 well is located, has good reservoir physical properties, which bring a high drilling efficiency. However, there are still some problems during its development, such as poor fracture extension both horizontally and vertically, limited stimulated reservoir volume (SRV), rapid production declining, large water production, and serious liquid accumulation. In this study, a comprehensive approach was proposed that can improve single-well production and EUR by optimizing the target position, horizontal section length, pathway, spacing, new drilling and fracturing technology, and production system.

scholarly journals Production logging via coiled tubing fiber optic infrastructures (FSI) and its application in shale gas wells

2019 ◽  
Vol 12 (24) ◽  
Author(s):  
Xuangang Meng ◽  
Weijia Wang ◽  
Zhenzhen Shen ◽  
Jiangyong Xiong ◽  
Heng Zhang
Keyword(s):  
Shale Gas ◽  
Fiber Optic ◽  
Development Mode ◽  
Gas Wells ◽  
Horizontal Section ◽  
Well Drilling ◽  
Coiled Tubing ◽  
Conventional Production ◽  
Main Development ◽  
Well Trajectory

AbstractMultistage stimulation operation using plug and perf technique is the main development mode in domestic shale gas play. Because of the particularity of well trajectory, well geometry caused by rapid drilling operation in shale gas wells, the residual plug debris after plug milling, the complexity of multiphase flow in horizontal section, etc., it is difficult for conventional production logging to meet the needs of shale gas wells. However, a number of shale gas wells need to be evaluated in the effects of well drilling and completion and fracturing, providing the guidance for the next fracturing design, so the production logging via coiled tubing fiber optic infrastructures (FSI) can satisfy the needs of shale gas wells, really reflect water holdup and gas holdup in different fracturing stage, and effectively evaluate fracturing effect of each stage.

scholarly journals Re-injection feasibility study of fracturing flow-back fluid in shale gas mining

2018 ◽  
Vol 121 ◽  
pp. 052032
Author(s):  
Dingyu Kang ◽  
Chen Xue ◽  
Xinjian Chen ◽  
Jiajia Du ◽  
Shengwei Shi ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Shale Gas

A prediction model of the shortest drilling time for horizontal section in extended-reach well

2019 ◽  
Vol 182 ◽  
pp. 106319 ◽  
Author(s):  
Xin Li ◽  
Deli Gao ◽  
Baoping Lu ◽  
Yijin Zeng ◽  
Shidong Ding ◽  
...  
Keyword(s):  
Prediction Model ◽  
Horizontal Section ◽  
Extended Reach Well ◽  
Drilling Time
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