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 | style="width: 259px; text-align: center;" | <div style="background:#eee;border:1px solid #ccc;padding:5px 10px;"><span style="color: rgb(0, 102, 204); font-family: sans-serif, arial, verdana, 'trebuchet ms'; font-weight: bold; line-height: 16.6399993896484px; text-align: center; background-color: rgb(238, 238, 238);">New topic pages</span></div>
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-| style="width: 266px;" | <span style="color:#0066cc;">'''Reservoir inflow in underbalanced drilling'''</span><br/><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 12.8000001907349px; line-height: 19.2000007629395px;">In </span>[http://petrowiki.org/Underbalanced_drilling_(UBD) <span style="font-family: sans-serif; font-size: 12.8000001907349px; line-height: 19.2000007629395px;">underbalanced&nbsp;</span>drilling (UBD)]<span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 12.8000001907349px; line-height: 19.2000007629395px;">, as soon as the bit penetrates the reservoir, reservoir fluids start to flow into the wellbore. At this stage, the stabilized multiphase flow regime in the well prior to reservoir fluid entry must be adjusted to account for inflow and minimize the impact to the circulation system or moving out of the UBD window already established.</span>&nbsp;<span style="line-height: 1.6;">&nbsp;</span>[http://petrowiki.org/Reservoir_inflow_in_underbalanced_drilling Learn &nbsp;more....]
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+<span style="color:#0066cc;"</span>[[Acoustic_velocity_dispersion_and_attenuation]]<span style="color:#0066cc;"</span><br/><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 12.8000001907349px; line-height: 19.2000007629395px;"></span>As seismic acoustic waves pass through rock, some of their energy will be lost to heat. For tight, hard rocks, this loss can be negligible. However, for most sedimentary rocks, this loss will be significant, particularly on seismic scales.
+[http://petrowiki.org/Acoustic_velocity_dispersion_and_attenuation Learn &nbsp;more....]
 | style="width: 259px;" | <span style="font-family: sans-serif, arial, verdana, 'trebuchet ms'; line-height: 16.6399993896484px;">New pages are continually added to PetroWiki. These new pages always need subject experts to help develop these pages into high quality resources. With so many different roles within PetroWiki that have to do with contributing there is undoubtedly a place that will fit perfectly with your expertise and time.&nbsp;</span>[http://petrowiki.org/Contribute%20what%20you%20know%20is%20right Read &nbsp;more about becoming a champion for PetroWiki…]<br/>
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 '''[http://www.spe.org/news/category/feature More SPE featured news...]'''
-| style="width: 259px;" | <p style="color: rgb(51, 51, 51); font-family: sans-serif, Arial, Verdana, 'Trebuchet MS'; font-size: 13px; line-height: 16.6399993896484px; text-align: center; background-color: rgb(255, 255, 255);">'''[http://petrowiki.org/Autonomous%20vehicles A][http://petrowiki.org/Autonomous%20vehicles utonomous&nbsp;vehicles]'''</p>
+| style="width: 259px;" | <p style="color: rgb(51, 51, 51); font-family: sans-serif, Arial, Verdana, 'Trebuchet MS'; font-size: 13px; line-height: 16.6399993896484px; text-align: center; background-color: rgb(255, 255, 255);"'''[[Well_integrity]]</p>
-<span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 12.8000001907349px; line-height: 19.2000007629395px;">Autonomous underwater vehicles (AUVs) are programmable robots that function independently from operator input. For the purposes of the oil and gas industry, AUVs are primarily used to survey seafloors before subsea infrastructures are built, to build subsea infrastructures and pipelines, and to survey pipelines after completion. AUVs can provide a less costly and invasive alternative to traditional surveying methods.</span>
+<span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 12.8000001907349px; line-height: 19.2000007629395px;"></span>As defined by '''NORSOK D-010''': “Application of technical, operational and organizational solutions to reduce risk of uncontrolled release of formation fluids throughout the life cycle of a well.” There are various facets to well integrity, including accountability/responsibility, well operating processes, well service processes, tubing/annulus integrity, tree/wellhead integrity, and testing of safety systems. [http://petrowiki.org/Well_integrity Read more...]<span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 12.8000001907349px; line-height: 19.2000007629395px;"></span>
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