Fazal Ridwan

EVALUASI HASIL PEREKAHAN HIDROLIK PADA SUMUR NAB-1

Introduction

Evaluasi hasil perekahan hidrolik pada sumur nab-1. Evaluasi hasil perekahan hidrolik pada sumur NAB-1 Lapangan E-Massive ONWJ. Teliti peningkatan produktivitas reservoar berpermeabilitas rendah melalui stimulasi hidrolik untuk optimasi.

Abstract

AbstrakSumur NAB-1 yang terletak di Lapangan E-Massive yang berada di bagian Timur dari KKS Offshore North West Java (ONWJ). Wilayah kontrak kerja PHE (Pertamina Hulu Energi) ONWJ terletak di bagian lepas pantai cekungan Northwest Java dimana cekungan Tersier asimetris berarah Barat Daya - Timur Laut terletak pada bagian tepi ujung Selatan lempeng benua Sunda yang terbentuk akhir Cretaceous. Cekungan ini dapat dibagi dari Barat-Timur menjadi North Seribu Through, cekungan Ardjuna, E-15 Graben, dan cekungan Jatibarang. Sumur NAB-1 merupakan sumur pada lapangan E-Main yang di bor pada tahun 2015. Pada awal sumur tersebut dilakukan pengujian, didapatkan bahwa lapisan prospek sumur tersebut memiliki permeabilitas 25 mD yang relative kecil menurut kalkulasi prediksi produksi. Bila sumur tersebut langsung diproduksikan, pay out time dari sumur tersebut akan berlangsung lama karena produktivitas yang kecil, sehingga perusahaan memutuskan untuk melakukan stimulasi pada lapisan tersebut. Jenis stimulasi yang dilakukan adalah stimulasi pada Tugas Akhir ini yaitu Hydraulic Fracturing.Kata kunci: hydraulic fracturing, net pressure, hydraulic horse power, fracture geometry, fracture conductivity, fold of increase AbstractNAB-1 well is located in E-massive field which located in the east-side of Offshore North West Java (ONWJ) KKS. PT. Pertamina Hulu Energi ONWJ concession territory is located on offshore North-West Java basin where assimetrical tertiary basin north-west directed is located in the edge of southern Sunda continental plate which is manifested in the end of Cretaceous. This basin is separated from west to east becomes North Seribu Through, Ardjuna Basin, E-15 Graben, and Jatibarang basin. NAB-1 is a well of E-massive field which is drilled in 2015. While this well is being tested by the end of drilling operation, the reservoir permeability meassured of FR-1 layer is 25 mD which is categorized as low-permeability reservoir. If this well is to be produced, long-period of pay out time is predicted to happen due to low productivity, therefore the company decided to execute a stimulation job in that layer. The stimulation executed is what is written in this Final Assignment, which is Hydraulic Fracturing.Kata kunci: hydraulic fracturing, net pressure, hydraulic horse power, fracture geometry, fracture conductivity, fold of increase

Review

This paper presents an evaluation of hydraulic fracturing applied to the NAB-1 well, situated in the E-Massive field within the Offshore North West Java (ONWJ) concession. The study addresses a common challenge in petroleum exploration and production: low reservoir permeability, specifically 25 mD in the NAB-1 well's FR-1 layer. This low permeability translates to poor initial productivity and an extended payout time, prompting the decision to implement hydraulic fracturing as a stimulation technique. The abstract effectively sets the context by detailing the well's geological setting within the complex Northwest Java basin and highlighting the economic imperative behind the stimulation effort. While the abstract clearly articulates the problem and the chosen solution, its "evaluation of results" component is primarily hinted at through the provided keywords. Terms such as 'net pressure,' 'hydraulic horse power,' 'fracture geometry,' 'fracture conductivity,' and 'fold of increase' strongly suggest the analytical framework and key performance indicators that the full paper will likely employ. These parameters are crucial for assessing the technical success and effectiveness of a hydraulic fracturing treatment, indicating that the study aims to quantify the impact of the stimulation on well performance and the resultant changes in reservoir flow characteristics. The study holds significant practical relevance for reservoir engineers and operators working with low-permeability reservoirs in the region. A detailed evaluation of a hydraulic fracturing job, particularly within the specific geological context of the Northwest Java basin, can provide valuable insights for optimizing future stimulation campaigns. To maximize its contribution, the full paper should thoroughly elaborate on the methodologies used for data acquisition and analysis, present concrete quantitative results for each of the identified evaluation parameters, and conclude with a clear assessment of the hydraulic fracturing treatment's success, both technically and economically.

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