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"Prediksi tekanan pori merupakan hal yang penting dalam persiapan program pemboran, khususnya jika diprediksi menembus zona gas dangkal. Program pemboran akan mempengaruhi saat penentuan desain selubung pemboran, berat lumpur dan mitigasi tekanan abnormal sebagai bahaya pemboran. Di lapangan ?B?, Cekungan Sumatera Tengah beberapa sumur mengalami tendangan lumpur (kick). Kejadian tersebut yang melatar belakangi studi tekanan pori untuk pemboran selanjutnya. Studi ini ditekankan pada teknik integrasi prediksi tekanan pori dari data sumur, yaitu data pemboran, wireline log, data tekanan formasi dan data seismik 2-D. Saat ini, teknologi seismik dengan dasar teknik geopressure dapat memberikan estimasi tekanan dari data kecepatan seismik dikombinasikan dengan data sumur memiliki tren yang sama. Studi ini menggunakan hasil analisa kecepatan seismik untuk mendapatkan resolusi tinggi kecepatan dalam tiga dimensi. Tahap kalibrasi dilakukan berdasarkan hasil perhitungan tekanan pori dari data sumur dan well log. Metoda Eaton merupakan metoda empiris untuk mengestimasi tekanan pori data log sonik, resistivitas, dan densitas yang dikalibrasi dengan pengukuran tekanan formasi dari data RFT dan DST. Prediksi tekanan pori di Lapangan ?B? dilakukan dapat membuat prediksi di seluruh area lapangan dan berguna dalam desain selubung pemboran, berat lumpur, dan pencegahan untuk drilling hazard.

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Pore Pressure Prediction is crucial to prepare a safe drilling program especially if there the well will potentially intersect shallow gas zones. It influences casing design, drilling mud weight and mitigation of overpressure as a drilling hazard. In the "B" Block, Central Sumatra Basin several wells have experienced kicks. These kicks led me to conduct a pore pressure study ahead of future drilling. The work more emphasize the technique integrated pore pressure prediction (PPP) brings together well and 2-D seismic data. The study used as input data from drilling data, wireline logs, pressure tests,and 2D Seismic.

Nowadays, seismic technology-based geopressure techniques provide an estimation of pore pressure from seismic velocity combine with well data has a relation in trend.

This study uses velocity analysis result to obtain a high-resolution velocity cube. Afterward, calibrated to pore pressure using well log and drilling data. The Eaton method is an empirical method to estimate pore pressures from sonic, resistivity and density logs which are calibrated to measured pore pressures from RFT and DST. In the "B" Block, the resistivity data did not reliably characterize pore pressure, and density data was incomplete, so the sonic log proved to be the most appropriate source data. Reliable pore pressure distribution required an empirical relationship between pore pressure and velocity. The Bentu Block pore pressure model created in this study allowed us to predict pore pressure throughout the block, and was used to design a drilling program especially for propose delineation wells, casing design, drilling mud weight, and overpressure prediction to prevent drilling hazards."

"Pemantauan dan analisis parameter geomekanik merupakan aspek krusial dalam memitigasi, mengidentifikasi, serta mengelola risiko untuk menjamin keselamatan dan keberlangsungan operasional tambang. Salah satu parameter geomekanik yang digunakan adalah kekuatan batuan (Uniaxial Compressive Strength, UCS) dan kualitas batuan (Rock Quality Designation, RQD). Namun, pengukuran kedua parameter ini bersifat destruktif dan membutuhkan waktu. Penggunaan metode alternatif dengan kecepatan gelombang primer (Vp) dalam mengestimasi nilai UCS dan RQD mulai dikembangkan. Penelitian ini bertujuan untuk menganalisis korelasi antara Vp dengan UCS dan RQD, serta membandingkan karakteristik parameter tersebut terhadap domain geologi yang meliputi formasi, litologi, dan alterasi di area Deep Mill Ore Zone (DMLZ). Hasil penelitian menunjukkan bahwa Vp memiliki korelasi positif yang kuat terhadap UCS dengan koefisien korelasi (R=0.882) dan persamaan empiris . Selain itu, Vp dan RQD juga menunjukkan korelasi yang signifikan (R=0.802) dengan persamaan empiris . Analisis karakteristik parameter terhadap domain geologi mengindikasikan bahwa semakin spesifik domain geologi yang ditinjau, semakin detail informasi yang diperoleh, di mana formasi Ekmai Limestone dan litologi sandy limestone memiliki kualitas parameter yang baik dibandingkan diorit, sementara pada tingkat alterasi, endoskarn menunjukkan performa terbaik dibandingkan phylic yang mengalami penurunan kualitas secara drastis.

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Monitoring and analyzing geomechanical parameters are critical components in mitigating, identifying, and managing risks to ensure the safety and sustainability of mining operations. Among the key geomechanical indicators utilized are Uniaxial Compressive Strength (UCS) and Rock Quality Designation (RQD), which serve as essential metrics in assessing the strength and quality of rock masses. However, the measurement of these two parameters is inherently destructive and time-consuming. As a result, alternative methods employing primary wave velocity (Vp) to estimate UCS and RQD values have begun to emerge. This study aims to analyze the correlation between Vp and both UCS and RQD, as well as to compare the characteristics of these parameters across different geological domains, including formation, lithology, and alteration within the Deep Mill Level Zone (DMLZ) area. The results of the study indicate a strong positive correlation between primary wave velocity (Vp) and uniaxial compressive strength (UCS), with a correlation coefficient of R = 0.882, and an established empirical equation describing this relationship . In addition, primary wave velocity (Vp) also exhibits a significant correlation with Rock Quality Designation (RQD), with a correlation coefficient of R = 0.802 and a corresponding empirical equation describing their relationship . The analysis of parameter characteristics across geological domains indicates that more specific geological classifications yield more detailed and informative results. The Ekmai Limestone formation and the Sandy Limestone lithology demonstrate superior parameter quality compared to diorite. At the alteration level, endoskarn exhibits the most favorable performance, whereas the phylic alteration zone shows a marked decline in rock quality."