The Handil field is a giant mature oil field in Indonesia. It has been producing since 1975 with current recovery factor for oil is 49% and gas is 57%. Cumulatively, oil had been produced around 855 MMstb and gas around 1.68 Tcf. Now, from this field, oil is being produced at 20,000 bopd, gas at 75 mmscfd and water at 130,000 bwpd. One of the feasible and economic ways to recover the remaining oil at this late stage of field production is by doing a Light Workover technique. This technique aims to change the well status without pulling out the existing completion. This technique is considered the optimum way to maintain the field production performance up to now. One of Light Workover technique is to do re-completion by inserting smaller completion inside existing completion. An innovative spool adapter was utilized to be able to run smaller completion and sit above existing wellhead. Hence, from three (3) depleted gas wells that were converted into oil wells, all wells are still producing and economically had been paid out the intervention cost. This technique is considered applicable for a mature oil field where some gas wells had been depleted and oil layers are exist.

After decades of field and laboratory studies, when compared to primary cementing, squeeze cementing defies standardization as a general practice. Each candidate for remedial cementing presents a unique challenge to the engineer, therefore, to address the variety of problems that may occur, a wide range of techniques has been developed combining placement methods, specific slurry formulations, and execution procedures. Recent advancement in workover techniques in brown fields which requires well intervention without pulling out or replacing the existing completion mostly for economic reasons, have added extra complications to the remedial cementing operations that makes the job success more challenging. It is a multidisciplinary field requiring knowledge and skills in geo-mechanics, fluid mechanics, and of course, cement-slurry systems. Handil field is a giant mature oil field in Indonesia that has been producing since 1975 with the current recovery factor of 49% for oil and 57% for gas. Cumulatively, the total oil produced is around 855 MMstb and gas around 1.68 Tcf with the current production of oil at 20,000 bopd, gas at 75 mmscfd and water at 130,000 bwpd. Applying enhanced oil recovery techniques, infill well drilling and light workover operations performed on existing wells are key elements to maintain field production. This paper outlines the field study analysis with the focus of improving the squeeze cementing success rate from the previous campaigns and will cover innovative solutions specially a novel placement technique that was adopted on a recent campaign. Successful results helped the operator to extend the life of the mature field by maintaining the production at its best level. Also a case history will be covered for the aim of better understanding the challenges being faced for properly isolating the compartmentalized sand reservoirs with different characteristics where proper analysis and innovative approach helped the operator achieving the objectives.

Bekapai, the oldest offshore field in Total E&P Indonesie, is a mature oil and gas field located in the offshore Mahakam Delta, Indonesia and discovered in April 1972. All Bekapai production is transferred to offshore Bekapai process facilities to separate and treat liquids and gas before sending them to the onshore processing centre in Senipah. Bekapai Redevelopment Phase 2B Project ("the Project"), a brown field project, is aimed to modify 5 offshore platforms (BG, BL, BA, PP, and SWPK) and debottleneck Bekapai field export capacity by installing new 12" subsea pipeline which will interconnect Bekapai and Peciko Field. The Project presents significant challenges in term of technical, cost, and schedule. It needs to be delivered within 15 months after FID (Final Investment Decision). Hence, the Project is the fastest and biggest offshore brown field modification done by Total E&P Indonesie. This paper will describe the technical, cost, and schedule challenges of the Project and how the PMT (Project Management Team) dealt with them without compromising safety, especially in avoiding schedule and cost slippage, the two aspects often found in projects and even worse for the brown field ones.

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