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16/25/14 Confidential Information © 2011 M-I SWACO FORM-A-BLOK A Severe Fluid-Loss Lost Circulation Material Milena Martinez & Lenaia Robinson IPAA project at MI-SWACO - 26 th June, 2014
26/25/14 Confidential Information © 2011 M-I SWACO FLUID LOSS Fluid Loss Loss of the fluid phase of a drilling fluid as it filters through porous rock Leaves a filter-cake behind proportional to fluid / filtrate loss Measured in lab – API, HPHT and DYNAMIC fluid-loss tests One of the most challenging problems faced by Operators while drilling for Oil and Gas is Lost Circulation 16.5ppg Lignosulfonate mud Dynamic Filtration filter-cakes 60min fluid loss 15D, 50µ filter media Base mud 72ml, 25/32 ” Base mud + 3% Black Fury 38ml, 12/32”
36/25/14 Confidential Information © 2011 M-I SWACO LOST CIRCULATION Lost Circulation – refers to loss of whole mud to the formation SEEPAGE Loss < 10 bbl/hr. PARTIAL Loss 10-20 bbl/hr. Tiger Bullets - A superior bridging agent highly effective when drilling high-permeability / high- porosity zones with high differential pressures HEAVY Loss 20-40 bbl/hr. SEVERE Loss >40 bbl/hr. Form-A-Squeeze - A high-fluid loss particulate LCM that address severe fluid loss in all types of fractures, vugular formations, matrix and underground blowout events Form-A-Blok - A high-fluid loss fibrous LCM designed for Wellbore Strengthening applications Tiger Bullets Form-A-SqueezeForm-A-Blok
46/25/14 Confidential Information © 2011 M-I SWACO FORM-A-BLOK Description A high-fluid loss fibrous LCM designed for Wellbore Strengthening applications and a wide variety of lost circulation scenarios, including, but not limited to fractures and matrix permeability Characteristic s Easily mixed in freshwater, seawater or base oil/syn. Combined with barite for weighted slurries Placed in and/or across loss zone → liquid phase squeezes from slurry Leaves a semi-permeable plug that seals the formation Not dependent on time, temp., activator/retarder or pH Stop loss occurring in WBMs, NAFs Can be used for seepage loss, @ 10ppb Can be used as plug to run in front of cement squeeze Can be used as plug to improve casing shoe integrity Application s Mixed according to mud weight typically @ 40ppb
56/25/14 Confidential Information © 2011 M-I SWACO WORKING IN THE LAB
66/25/14 Confidential Information © 2011 M-I SWACO PLUGS WHEN MIXED IN WATER Water, gFAB, gBarite, gFiltrate, gPlug wt, g Time to De-fluidize, s Un-weighted3304002778930 12ppg2874017622227537 16ppg2353039615049753 API filtration plugs @ 100psi on a 60 mesh, 250µ scre en
76/25/14 Confidential Information © 2011 M-I SWACO IMPORTANCE OF SHEAR STRENGTH
86/25/14 Confidential Information © 2011 M-I SWACO SHEAR STRENGTH MEASUREMENT
96/25/14 Confidential Information © 2011 M-I SWACO LOAD FRAME & SHEAR STRENGTH MEASUREMENT
106/25/14 Confidential Information © 2011 M-I SWACO BACKGROUND LCM Mud Invasion through 20-40 frac sand in API fluid loss cell Wet compacted 20-40 frac sand 2 inches deep Total Fluid Invasion of Base mud through frac sand @ 100psi ~0.4 inches Fluid Invasion of Base mud with 8ppb Form-A-Blok after 5 min @ 100psi
116/25/14 Confidential Information © 2011 M-I SWACO APPLICATIONS IN NAM, 2014 DateOperatorLocation January Stone EnergyGOM Stone EnergyGOM Energy Partners LimitedGOM February Apache CorporationMid-Continent March BHPPermian Basin Walter Oil & GasGOM April Continental Natural ResourcesMid-Continent OXYSouth Texas Walter Oil & GasGOM May Continental Natural ResourcesOklahoma June Shoreline EnergyLouisiana Continental Natural ResourcesOklahoma
126/25/14 Confidential Information © 2011 M-I SWACO FIELD EXAMPLES RegionMD (ft) EventLCM work? MW in ppg FAB work?Final MW ppg Alaska7881T.L.No9.5Yes10.3 Alaska11005200bphNo9.8Yes10.3 Mexico14125200bphNo14.2Yes12.7 Egypt18737T.L.No12.5Yes12.5 Mexico14436T.L.11.5Yes13.3 Mexico1296338bph16.7Yes16.9 Mexico1552538bph16.7Minor Loss17.5 Mexico1937363bph8.2Yes10.4 Mexico20784T.L.12.5Yes15.8 Mexico1767438bph9.6Minor Loss10.0 Mexico1213913bph16.0Minor Loss17.2
136/25/14 Confidential Information © 2011 M-I SWACO NEW EXCITING DEVELOPMENTS Acid-Soluble Form-A-Blok was recently developed for losses in Production zone 95% acid soluble in 15% HCl @ 212 °F Shear Strength of ~ 2400 psi compared to ~ 2700psi for regular FAB in water Project is currently underway to enhance Cement’s bonding strength Currently, competitor’s LCM product Diaseal-M is added to Cement To replace with the addition of Form-A-Blok to Cement Initial testing shows – no Contamination effect Up to 120ppb Cement, class G added to 40 ppb FORM-A-BLOK slurry → No change in de-fluidizing rate. Next: To measure Shear Strengths of plugs…in dry and wet conditions
146/25/14 Confidential Information © 2011 M-I SWACO
156/25/14 Confidential Information © 2011 M-I SWACO SPECIAL ACKNOWLEDMENT Schlumberger MI-SWACO Lashaunda Johnson Kumar Ramtahal Josh Sheldon Asma Huissini Ingrid Velasco Brian Rogers Aaron Blue Mishel Grubac Khai Ngyen Tim Wilkin Tim Hubbard Hernan Hernandez
166/25/14 Confidential Information © 2011 M-I SWACO THANK YOU QUESTIONS?
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