Slimhole-Tubingless: Cost Effective Well Architecture to Develop Tunu Field, Mahakam Delta Area - East Kalimantan

2018 ◽  
Author(s):  
Fata Yunus
Keyword(s):  
Cost Effective ◽  
Delta Area ◽  
East Kalimantan ◽  
Mahakam Delta

Annulus Cementing with Coil Tubing Packer Methods with Case Study on Sisi Nubi Field

2020 ◽  
Author(s):  
R Rachman
Keyword(s):  
Cost Efficiency ◽  
Operating Time ◽  
Field Application ◽  
Offshore Area ◽  
Delta Area ◽  
New Methods ◽  
East Kalimantan ◽  
Mahakam Delta ◽  
Offshore Field

PHM fields are located in The Mahakam Delta and Offshore area in East Kalimantan, Indonesia. Most of the wells are multizone gas producers completed with cemented tubing which cover only the main zone, but for shallower reservoirs, these have not been targeted until recent years. To unlock a shallow reservoir target, annulus cementing is required as a well barrier prior to perforation. There are several conventional methods of annulus cementing which have been implemented in Mahakam for well intervention activities, such as: a. Annulus cementing with balance meod; b. Annulus cementing with cement retainer. The Sisi Nubi well is one case study of annulus cementing with conventional method using the balance method that experienced failure during the cementing job and created the problem of cement flow back to the tubing. Consequently, this required additional intervention to clear access by milling and underreaming operations that build high cost. The Well Intervention division is continuously looking for new methods to reduce operating time and cost efficiency. Annulus Cementing with Coil Tubing (CT) packer is a new method to perform annulus cementing resulting in clean wellbore and high quality cement in the annulus. This method has been successfully implemented in Sisi Nubi wells with satisfactory results.The principle of annulus cementing with CT packer is temporary set on the well bore to prevent upward and downward movement of fluid or pressure during and after cementing operation, and also to avoid cement contamination with wellbore fluid. Following the success in offshore field application, the division then extended the application in the fields at the Delta area.

First Application Drilling New Wells with HWU in Swamp Environment, Mahakam Delta

2021 ◽  
Author(s):  
R. A. S Wijaya
Keyword(s):  
Drilling Rate ◽  
Shallow Gas ◽  
Field Development ◽  
Drilling Rig ◽  
East Kalimantan ◽  
Well Location ◽  
Shallow Wells ◽  
Drilling Unit ◽  
Mature Field ◽  
Mahakam Delta

Tunu is a mature giant gas and condensate field locate in Swamp Area on Mahakam Delta, East Kalimantan, Indonesia. The field has been in developed for more than 40 years and considered as a mature field. As mature field, finding an economic well has become more challenging nowadays. The deeper zone of Tunu (TMZ) has no longer been considered profitable to be produced and the focus is shifted more on the producing widespread shallow gas pocket located in the much shallower zone of Tunu (TSZ). Facing the challenge of marginal reserves in the mature field, Pertamina Hulu Mahakam (PHM) take two approaches of reducing well cost thus increase well economics, improving drilling efficiency and alternative drilling means. Continues improvement on drilling efficiency by batch drilling, maxi drill, maximizing offline activities and industrialization of one phase well architecture has significantly squeezed the well duration. The last achievement is completing shallow well in 2.125 days from average of 6.5 days in period of 2017-2019. Utilization of Swamp Barge Drilling Rig on swamp area had been started from the beginning of the field development in 1980. Having both lighter and smaller drilling unit as alternative drilling means will give opportunity of reducing daily drilling rate. Hydraulic Workover Unit (HWU) comes as the best alternative drilling means for swamp area. In addition, fewer and smaller footprint equipment requires smaller barges with purpose of less civil works to dredge the river and preparing well location. Drilling with HWU project has been implemented at Tunu area with 5 wells has been completed successfully and safely. HWU drilling concept considered as proven alternative drilling means for the future of shallow wells development.

One Phase Well OPW : Unlock Shallow Reservoir Efficient and Economically by Eliminating Surface Casing

2021 ◽  
Author(s):  
Irfan Hanif ◽  
Bramarandhito Sayogyo ◽  
R Riko ◽  
Praja Hadistira ◽  
Karina Sari
Keyword(s):  
Shallow Gas ◽  
Two Phase ◽  
East Kalimantan ◽  
Drilling Operations ◽  
The Common ◽  
Mature Field ◽  
The Cost ◽  
Mahakam Delta ◽  
Common Architecture ◽  
Drilling Time

Abstract Tunu is a mature giant gas and condensate field locate in Mahakam Delta, East Kalimantan, Indonesia. The field has been in development for almost 30 years and currently has been considered as a mature field where to put a state of an economic well has become more challenging nowadays. The deeper zone of Tunu has no longer been considered as profitable to be produced and the current focus is more on the widespread shallow gas pocket located in the much shallower zone of Tunu. One phase well is architecture without 9-5/8" surface casing. OPW is one-section drilling using a diverter mode from surface to TD without using BOP. Historical for OPW is began from 2018, where drilling reservoir section using diverter mode in two-phase. In 2018 also succeeded in performing perforated surface casing. Due successfully in drilling operation using diverter and perforated surface casing, in 2019 drilling trials for OPW were carried out. Until now, the OPW architecture has become one of the common architecture used in drilling operations as an optimization effort. Until December 2020 PHM has completed 15+ OPW wells. A general comparison of OPW and SLA well is at the cost of constructing a well of approximately 200,000 - 300,000 US$. The disadvantages of OPW wells are more expensive in the mud and cement section when using a 9-1/2" hole, but in terms of the duration, OPW drilling time is more efficient up to 2-3 days. If viewed from the integrity of the OPW wells, from 15 OPW wells that have been completed, only 2 of them have SCP.

Lookback on Performance of 50 Horizontal Wells Targeting Thin Oil Columns, Mahakam Delta, East Kalimantan

2000 ◽  
Author(s):  
D.T. Vo ◽  
Sukerim Waryan ◽  
Agung Dharmawan ◽  
Rusdi Susilo ◽  
Renas Wicaksana
Keyword(s):  
Horizontal Wells ◽  
East Kalimantan ◽  
Mahakam Delta
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