THE EFFECT OF FRACTURE INTENSITY DISTRIBUTION ON PRODUCTIVITY AND FLOWING PRESSURE DISTRIBUTION ALONG THE HORIZONTAL WELLS

• Main Author: Ibrahim , Malik
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/5286
• Institution: Institut Teknologi Bandung

<b>Abstrak :</b><p align=\"justify\">As the length of horizontal well increased, its productivity increases due to a larger contact area with reservoir. In the same time the flow resistance also increases, which gives negative impact on horizontal well productivity. Overall, the performance of horizontal well depends on the balance of both opposite factors. Neglecting frictional effect could lead us to over estimate well productivity and earlier breakthrough time of water or gas. <br /> <br /> A semi-analytical model was developed, which can quantify the effects of frictional pressure loses on the overall horizontal well performance. The model is quite flexible and can incorporate any friction factor correlation. Unfortunately, the model is limited by a constant value of Specific Productivity Index along the wellbore. In this study, we developed a model, which accommodate the variation of Productivity Index along the wellbore. A horizontal well penetrates a limited naturally fractured reservoir. The distribution of fracture intensity is varied along the wellbore. <br /> <br /> The purposes of present work are to study the effects of fracture intensity distribution on the horizontal well performance and pressure distribution along the wellbore. This study demonstrated that the frictional pressure drop is very sensitive with well diameter, and less sensitive with wellbore roughness. For diameter 3 to 4 inc with open hole completion, the productivity reduces up to 13 % due to wall friction. Variation of fractures distribution reduces well productivity in the range of 3.8 % to 8.8 % compared to a homogeneous fractures distribution. To maximize the well productivity, the penetration of horizontal well is suggested to start from a high fracture intensity area to a low fracture intensity area.